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TECHNICAL DATA & SERVICE MANUAL
Model No.
Outdoor Units
Type
Outdoor Units
U
Single
Indoor Units
Type
Indoor Units Type
U1
4-Way Cassette
K1
Wall Mounted
T1
Ceiling
F1
Low Silhouette Ducted
F2
Concealed Duct
U2
4-Way Cassette 36" × 36"
K2
Wall Mounted
T2
Ceiling
* Panel (optional parts)
85464849303004
Indoor Unit
Shows S-26PU1U6
Nominal Capacity
26
U-26PE1U6
U-36PE1U6
U-26PS1U6
U-36PS1U6
Nominal Capacity
26
S-26PU1U6
S-36PU1U6
S-26PK1U6
S-26PT1U6
S-36PT1U6
S-26PF1U6
S-36PF1U6
S-26PF2U6
S-36PF2U6
S-26PU2U6
S-36PU2U6
(CZ-36KPU3U)*
(CZ-36KPU3U)*
S-26PK2U6
S-26PT2U6
S-36PT2U6
36
42
U-42PE1U6
U-42PS1U6
36
42
S-42PU1U6
S-42PT1U6
S-42PU2U6
(CZ-36KPU3U)*
S-42PT2U6
Order No. SM830203-11CE
Outdoor Unit
Shows U-26PE1U6
Remarks
Cooling/Heating
Cooling
Remarks
with Wired Remote Controller: CZ-RTC2
with Wireless Remote Controller: CZ-RWSK1U
with Wired Remote Controller: CZ-RTC2
with Wired Remote Controller: CZ-RTC2
REFERENCE NO
SM830203-04
.

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Table of Contents

   Related Manuals for Panasonic U-26PE1U6

   Summary of Contents for Panasonic U-26PE1U6

  • Page 1 Order No. SM830203-11CE TECHNICAL DATA & SERVICE MANUAL Outdoor Unit Indoor Unit Shows S-26PU1U6 Shows U-26PE1U6 Model No. Outdoor Units Nominal Capacity Type Outdoor Units Remarks U-26PE1U6 U-36PE1U6 U-42PE1U6 Cooling/Heating Single U-26PS1U6 U-36PS1U6 U-42PS1U6 Cooling Indoor Units Nominal Capacity Type...
  • Page 2 IMPORTANT! When Transporting Please Read Before Starting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees This air conditioning system meets strict safety and when lifting to reduce strain on your back. Sharp edges or operating standards.
  • Page 3 • Do not leak refrigerant while piping work for an installation or re-installation, and while repairing CAUTION refrigeration parts. Handle liquid refrigerant carefully as it may cause • Do not touch the air inlet or the sharp frostbite. aluminum fi ns of the outdoor unit. You When Servicing may get injured.
  • Page 4: Precautions For Installation Using New Refrigerant

    Check of Density Limit the multi air conditioner system is to be installed in a The room in which the air conditioner is to be small room, select a suitable model and installation pro- installed requires a design that in the event of refrig- cedure so that if the refrigerant accidentally leaks out, its erant gas leaking out, its density will not exceed a set limit.
  • Page 5 3. Different tools required 3-1. Tool specifications have been changed due to the characteristics of R410A. Some tools for R22- and R407C-type refrigerant systems cannot be used. Manifold gauge R407C tools Item compatible Remarks tool? with R410A? Manifold gauge Types of refrigerant, refrigerating machine oil, and pressure gauge are different.
  • Page 6: Table Of Contents

    Contents Section 1: SPECIFICATIONS ..................... 1-1 1-1. Unit Specifications ....................1-2 1-2. Major Component Specifications ..............1-29 1-3. Other Component Specifications ..............1-53 1-4. Dimensional Data....................1-56 1-5. Refrigerant Flow Diagram ................. 1-70 1-6. Operating Range ....................1-71 1-7. Capacity Correction Graph According to Temperature Condition ..... 1-72 1-8.
  • Page 7 Section 6: TEST RUN ......................... 6-1 6-1. Preparing for Test Run ..................6-2 6-2. Caution ....................... 6-3 6-3. Test Run Procedure .................... 6-3 6-4. Items to Check Before the Test Run..............6-4 6-5. Test Run Using the Remote Controller ............... 6-4 6-6.
  • Page 8 — MEMO —...
  • Page 9: Section 1: Specifications

    1. SPECIFICATIONS 1-1. Unit Specifications....................1-2. Major Component Specifications ................1-29 1-3. Other Component Specifications ................1-53 1-4. Dimensional Data ....................1-56 1-5. Refrigerant Flow Diagram ..................1-70 1-6. Operating Range ..................... 1-71 1-7. Capacity Correction Graph According to Temperature Condition ..... 1-72 1-8.
  • Page 10 1. Specifications 1-1. Unit Specifications Concealed Duct (Type F2) INDOOR MODEL S-26PF2U6 PANEL MODEL OUTDOOR MODEL U-26PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY CAPACITY *1 BTU/h 24000 24000 9500...
  • Page 11 1. Specifications 1-1. Unit Specifications Concealed Duct (Type F2) INDOOR MODEL S-36PF2U6 PANEL MODEL OUTDOOR MODEL U-36PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY CAPACITY *1 BTU/h 31200 31200 9500 31200 CURRENT *1 *4 1.53...
  • Page 12: Unit Specifications

    1. Specifications 1-1. Unit Specifications 4-Way Cassette (Type U1) MODEL No. S-26PU1U6 U-26PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 24,800 [9,500~24,800] 29,800 [8,000~29,800] ˚ 7 Moisture removal (High)
  • Page 13 1. Specifications 1-1. Unit Specifications 4-Way Cassette (Type U1) MODEL No. S-36PU1U6 U-36PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 32,600 [9,500~32,600] 37,600 [8,000~37,600] ˚ 7 Moisture removal (High) Pints / h 10.6 Air circulation (H / M / L) 230 V...
  • Page 14 1. Specifications 1-1. Unit Specifications 4-Way Cassette (Type U1) MODEL No. S-42PU1U6 U-42PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 39,500 [9,500~39,500] 48,000 [8,000~48,000] ˚ 7 Moisture removal (High) Pints / h 12.6 Air circulation (H / M / L) 230 V...
  • Page 15 1. Specifications 1-1. Unit Specifications 4-Way Cassette (Type U1) MODEL No. S-26PU1U6 U-26PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 24,800 [9,500~24,800] (17˚F)** BTU / h Air circulation (H / M / L) 230 V 710 / 530 / 450 External Static Pressure in.
  • Page 16 1. Specifications 1-1. Unit Specifications 4-Way Cassette (Type U1) MODEL No. S-36PU1U6 U-36PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 32,600 [9,500~32,600] (17˚F)** BTU / h Air circulation (H / M / L) 230 V 1050 / 840 / 720 External Static Pressure in.
  • Page 17 1. Specifications 1-1. Unit Specifications 4-Way Cassette (Type U1) MODEL No. S-42PU1U6 U-42PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 39,500 [9,500~39,500] (17˚F)** BTU / h Air circulation (H / M / L) 230 V 1050 / 840 / 720 External Static Pressure in.
  • Page 18 1. Specifications 1-1. Unit Specifications Wall Mounted (Type K1) MODEL No. S-26PK1U6 U-26PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 25,200 [9,500~25,200] 29,200 [8,000~29,200] ˚ 7 Moisture removal (High)
  • Page 19 1. Specifications 1-1. Unit Specifications Wall Mounted (Type K1) MODEL No. S-26PK1U6 U-26PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 25,200 [9,500~25,200] (17˚F)** BTU / h Air circulation (H / M / L) 230 V 559 / 475 / 390 External Static Pressure in.
  • Page 20 1. Specifications 1-1. Unit Specifications Ceiling (Type T1) MODEL No. S-26PT1U6 U-26PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 24,400 [9,500~24,400] 30,800 [8,000~30,800] ˚ 7 Moisture removal (High)
  • Page 21 1. Specifications 1-1. Unit Specifications Ceiling (Type T1) MODEL No. S-36PT1U6 U-36PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 31,200 [9,500~31,200] 37,400 [8,000~37,400] ˚ 7 Moisture removal (High) Pints / h 10.0 Air circulation (H / M / L) 230 V...
  • Page 22 1. Specifications 1-1. Unit Specifications Ceiling (Type T1) MODEL No. S-42PT1U6 U-42PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 39,000 [9,500~39,000] 44,500 [8,000~44,500] ˚ 7 Moisture removal (High) Pints / h 12.6 Air circulation (H / M / L) 230 V...
  • Page 23 1. Specifications 1-1. Unit Specifications Ceiling (Type T1) MODEL No. S-26PT1U6 U-26PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 24,400 [9,500~24,400] (17˚F)** BTU / h Air circulation (H / M / L) 230 V 550 / 490 / 460 External Static Pressure in.
  • Page 24 1. Specifications 1-1. Unit Specifications Ceiling (Type T1) MODEL No. S-36PT1U6 U-36PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 31,200 [9,500~31,200] (17˚F)** BTU / h Air circulation (H / M / L) 230 V 1100 / 930 / 750 External Static Pressure in.
  • Page 25 1. Specifications 1-1. Unit Specifications Ceiling (Type T1) MODEL No. S-42PT1U6 U-42PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 39,000 [9,500~39,000] (17˚F)** BTU / h Air circulation (H / M / L) 230 V 1130 / 950 / 775 External Static Pressure in.
  • Page 26 1. Specifications 1-1. Unit Specifications Low Silhouette Ducted (Type F1) MODEL No. S-26PF1U6 U-26PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 24,000 [9,500~24,000] 28,600 [8,000~28,600] ˚ 7 Moisture removal (High)
  • Page 27 1. Specifications 1-1. Unit Specifications Low Silhouette Ducted (Type F1) MODEL No. S-36PF1U6 U-36PE1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Heating Capacity * [minimum~muximum] BTU / h 31,200 [9,500~31,200] 36,200 [8,000~36,200] ˚ 7 Moisture removal (High) Pints / h 10.0 Air circulation (H / M / L) 230 V...
  • Page 28 1. Specifications 1-1. Unit Specifications Low Silhouette Ducted (Type F1) MODEL No. S-26PF1U6 U-26PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 24,000 [9,500~24,000] (17˚F)** BTU / h — Air circulation (H / M / L) 230 V 670 / 530 / 460 External Static Pressure in.
  • Page 29 1. Specifications 1-1. Unit Specifications Low Silhouette Ducted (Type F1) MODEL No. S-36PF1U6 U-36PS1U6 POWER SOURCE 230 - 208V / 1 Phase / 60Hz PERFORMANCE Cooling Capacity * [minimum~muximum] BTU / h 31,200 [9,500~31,200] (17˚F)** BTU / h — Air circulation (H / M / L) 230 V 1060 / 920/ 750 External Static Pressure in.
  • Page 30 1. Specifications 1-1. Unit Specifications 4-Way Cassette 36” × 36” (Type U2) INDOOR MODEL S-26PU2U6 PANEL MODEL CZ-36KPU3U OUTDOOR MODEL U-26PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY CAPACITY *1 BTU/h...
  • Page 31 1. Specifications 1-1. Unit Specifications 4-Way Cassette 36” × 36” (Type U2) INDOOR MODEL S-36PU2U6 PANEL MODEL CZ-36KPU3U OUTDOOR MODEL U-36PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY CAPACITY *1 BTU/h 32600 32600...
  • Page 32 1. Specifications 1-1. Unit Specifications 4-Way Cassette 36” × 36” (Type U2) INDOOR MODEL S-42PU2U6 PANEL MODEL CZ-36KPU3U OUTDOOR MODEL U-42PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY 11.4 11.4 CAPACITY *1 BTU/h 39000...
  • Page 33 1. Specifications 1-1. Unit Specifications Wall Mounted (Type K2) INDOOR MODEL S-26PK2U6 PANEL MODEL OUTDOOR MODEL U-26PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY CAPACITY *1 BTU/h 24000 24000 9500...
  • Page 34 1. Specifications 1-1. Unit Specifications Ceiling (Type T2) INDOOR MODEL S-26PT2U6 PANEL MODEL OUTDOOR MODEL U-26PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY CAPACITY *1 BTU/h 24000 24000 9500 24000 CURRENT *1 *4 0.46...
  • Page 35 1. Specifications 1-1. Unit Specifications Ceiling (Type T2) INDOOR MODEL S-36PT2U6 PANEL MODEL OUTDOOR MODEL U-36PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY CAPACITY *1 BTU/h 32600 32600 9500 32600 CURRENT *1 *4 0.71 0.67...
  • Page 36 1. Specifications 1-1. Unit Specifications Ceiling (Type T2) INDOOR MODEL S-42PT2U6 PANEL MODEL OUTDOOR MODEL U-42PE1U6 Branch pipe MODEL PERFORMANCE TEST CONDITION ARI Standard 210/240 PH, Hz 1PH, 60Hz 1PH, 60Hz POWER SUPPLY 11.4 11.4 CAPACITY *1 BTU/h 39000 39000 14000 39000 CURRENT *1 *4...
  • Page 37: Major Component Specifications

    1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-26PF2U6 Source 230 - 208 V / 1 phase / 60 Hz Controller P. C. B Ass'y A73C8391 Fan (Number … diameter) in. (mm) Sirocco Fan (2 ... 7-9/32” (185 mm)) Fan motor Model SIC-70CW-D8120-4...
  • Page 38 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-36PF2U6 Source 230 - 208 V / 1 phase / 60 Hz Controller P. C. B Ass'y A73C8392 Fan (Number … diameter) in. (mm) Sirocco Fan (3 ... 7-9/32” (185 mm)) Fan motor Model SIC-101CW-D8200-2...
  • Page 39 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-26PU1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller (Supplied / Optional) Wired / Wireless (See Unit Specifications) Controller P. C. B Ass'y CR-26PU1U6-P Control circuit fuse 250 VAC, 5 A Fan (Number …...
  • Page 40 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-36PU1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller ( Supplied / Optional ) Wired / Wireless (See Unit Specifications) Controller P. C. B Ass'y CR-26PU1U6-P Control circuit fuse 250 VAC, 5 A...
  • Page 41 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-42PU1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller (Supplied / Optional) Wired / Wireless (See Unit Specifications) Controller P. C. B Ass'y CR-26PU1U6-P Control circuit fuse 250 VAC, 5 A Fan (Number …...
  • Page 42 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-26PK1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller ( Optional / Supplied ) Wired / Wireless (See Unit Specifications) Controller P. C. B Ass'y CB-KR254GXH56A Cross-flow Number ...
  • Page 43 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-26PT1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller ( Supplied / Optional ) Wired / Wireless (See Unit Specification) Controller P. C. B Ass'y CR - TH2672 Control circuit fuse 250 V, 5 A...
  • Page 44 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-36PT1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller ( Supplied / Optional ) Wired / Wireless (See Unit Specification) Controller P. C. B Ass'y CR - TH2672 Control circuit fuse 250 V, 5 A...
  • Page 45 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-42PT1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller ( Supplied / Optional ) Wired / Wireless (See Unit Specification) Controller P. C. B Ass'y CR - TH2672 Control circuit fuse 250 V, 5 A...
  • Page 46 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-26PF1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller ( Supplied / Optional ) Wired / Wireless (See Unit Specification) Controller P. C. B Ass'y CR - TH2672 Control circuit fuse 250 V, 5 A...
  • Page 47 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No. S-36PF1U6 Source 230 - 208 VAC / 1 phase / 60Hz Remote controller ( Supplied / Optional ) Wired / Wireless (See Unit Specification) Controller P. C. B Ass'y CR - TH2672 Control circuit fuse 250 V, 5 A...
  • Page 48 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No . S-26PU2U6 Source 230 - 208 V / 1 phase / 60Hz Controller P. C. B Ass'y A73C8682 (Microprocessor) Turbo (1…Φ19-9 / 32” (Φ490) ) Fan (Number … diameter) Fan motor Model SIC - 62FW - D866-3...
  • Page 49 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No . S-36PU2U6 Source 230 - 208 V / 1 phase / 60Hz A73C8683 (Microprocessor) Controller P. C. B Ass'y Fan (Number … diameter) Turbo (1…Φ19-9 / 32” (Φ490) ) Fan motor Model SIC - 72FW - D892-4...
  • Page 50 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No . S-42PU2U6 Source 230 - 208 V / 1 phase / 60Hz A73C8684 (Microprocessor) Controller P. C. B Ass'y Fan (Number … diameter) Turbo (1…Φ19-9 / 32” (Φ490) ) Fan motor Model SIC - 72FW - D892-4...
  • Page 51 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit S-26PK2U6 MODEL No. Source 230 - 208 V / 1 phase / 60Hz Controller P.C.B. Ass'y CB-26PK2U6 Cross-flow (1...ø3-15 / 16 (ø100) / L32-63 / 64 (L838) ) Fan (Number...diameter / length) in.
  • Page 52 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No . S-26PT2U6 Source 230 - 208 V / 1 phase / 60Hz Controller P. C. B Ass'y A73C8687 (Microprocessor) Sirocco Fan (3…Φ5-26 / 32” (Φ147.5) ) Fan (Number … diameter) Fan motor Model SIC - 60CW - D874-2...
  • Page 53 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No . S-36PT2U6 Source 230 - 208 V / 1 phase / 60Hz Controller P. C. B Ass'y A73C8688 (Microprocessor) Sirocco Fan (4…Φ5-26 / 32” (Φ147.5) ) Fan (Number … diameter) Fan motor Model SIC - 70CW - D8111-3...
  • Page 54 1. Specifications 1-2. Major Component Specifications (A) Indoor Unit MODEL No . S-42PT2U6 Source 230 - 208 V / 1 phase / 60Hz Controller P. C. B Ass'y A73C8689 (Microprocessor) Sirocco Fan (4…Φ5-26 / 32” (Φ147.5) ) Fan (Number … diameter) Fan motor Model SIC - 70CW - D8111-3...
  • Page 55 1. Specifications 1-2. Major Component Specifications (B) Outdoor Unit MODEL No. U-26PE1U6 Source 230 - 208 VAC / 1 phase / 60Hz Controller P.C.B. Ass'y CR-CH4872R (Microprocessor) Control circuit fuse (on the P.C.B.“FIL-CH4872R”) 280 V, 25 A Compressor Model..number C-7RVN153H0U...
  • Page 56 1. Specifications 1-2. Major Component Specifications (B) Outdoor Unit MODEL No. U-36PE1U6 Source 230 - 208 VAC / 1 phase / 60Hz Controller P.C.B. Ass'y CR-CH4872R (Microprocessor) Control circuit fuse (on the P.C.B.“FIL-CH4872R”) 280 V, 25 A Compressor Model..number C-7RVN153H0U 1,500 l i o gal.
  • Page 57 1. Specifications 1-2. Major Component Specifications (B) Outdoor Unit MODEL No. P-42PE1U6 Source 230 - 208 VAC / 1 phase / 60Hz Controller P.C.B. Ass'y CR-CH4872R (Microprocessor) Control circuit fuse (on the P.C.B.“FIL-CH4872R”) 280 V, 25 A Compressor Model..number C-9RVN273H0W 2,700 l i o gal.
  • Page 58 1. Specifications 1-2. Major Component Specifications (B) Outdoor Unit MODEL No. U-26PS1U6 Source 230 - 208 VAC / 1 phase / 60Hz Controller P.C.B. Ass'y CR-CH4872R (Microprocessor) Control circuit fuse (on the P.C.B.“FIL-CH4872R”) 280 V, 25 A Compressor Model..number C-7RVN153H0U 1,500 l i o gal.
  • Page 59 1. Specifications 1-2. Major Component Specifications (B) Outdoor Unit MODEL No. U-36PS1U6 Source 230 - 208 VAC / 1 phase / 60Hz Controller P.C.B. Ass'y CR-CH4872R (Microprocessor) Control circuit fuse (on the P.C.B.“FIL-CH4872R”) 280 V, 25 A Compressor Model..number C-7RVN153H0U 1,500 l i o gal.
  • Page 60 1. Specifications 1-2. Major Component Specifications (B) Outdoor Unit MODEL No. U-42PS1U6 Source 230 - 208 VAC / 1 phase / 60Hz Controller P.C.B. Ass'y CR-CH4872R (Microprocessor) Control circuit fuse (on the P.C.B.“FIL-CH4872R”) 280 V, 25 A Compressor Model..number C-9RVN273H0W 2,700 l i o gal.
  • Page 61: Other Component Specifications

    1. Specifications 1-3. Other Component Specifications Outdoor Unit U-26PE1U6, U-26PS1U6 Thermistor (Coil sensor) : TH2 to 5 14 °F : 23.7 50 °F : 9.7 Coil resistance kΩ 23 °F : 18.8 68 °F : 6.5 32 °F : 15.0 86 °F : 4.4...
  • Page 62 1. Specifications 1-3. Other Component Specifications Outdoor Unit U-36PE1U6, U-36PS1U6 Thermistor (Coil sensor) : TH2 to 5 14 °F : 23.7 50 °F : 9.7 Coil resistance kΩ 23 °F : 18.8 68 °F : 6.5 32 °F : 15.0 86 °F : 4.4 41 °F : 12.1 104 °F : 3.1...
  • Page 63 1. Specifications 1-3. Other Component Specifications Outdoor Unit U-42PE1U6, U-42PS1U6 Thermistor (Coil sensor) : TH2 to 5 14 °F : 23.7 50 °F : 9.7 Coil resistance kΩ 23 °F : 18.8 68 °F : 6.5 32 °F : 15.0 86 °F : 4.4 41 °F : 12.1 104 °F : 3.1...
  • Page 64: Dimensional Data

    1. Specifications 1-4. Dimensional Data Indoor Unit : Concealed Duct (Type F2) Unit: inch (mm) Air intake port side 11-7/16 (Suspension bolt pitch) (290) 10-3/64 6-49/64 (255) (172) Inspection access 1-1/32 23-5/8 × 23-5/8 (26.1) (600 × 600 mm) (Field supply) 1-5/16 5-29/32 (33.4)
  • Page 65 1. Specifications 1-4. Dimensional Data Indoor Unit : 4-Way Cassette (Type U1) Type 26 10-9/32 8-11/16 4-7/8 Min. 2-15/32 Min. 19/32 4-7/8 2-5/16 6-3/16 7-5/32 12-1/8 1-3/16 33-27/32 32-9/32 (Ceiling opening) 4-7/8 29-13/16 (Suspention bolt pitch) 19-11/16 1-7/8 4-7/8 8-11/16 2-3/8 Dimension : inch Air intake grille...
  • Page 66 1. Specifications 1-4. Dimensional Data Indoor Unit : 4-Way Cassette (Type U1) Type 36, 42 11-15/32 4-7/8 9-19/32 Min. 2-15/32 Min. 19/32 2-5/16 6-3/16 7-5/32 4-7/8 32-9/32 (Ceiling opening) 33-27/32 13-5/16 1-3/16 4-7/8 29-13/16 (Suspention bolt pitch) 19-11/16 1-7/8 4-7/8 9-19/32 2-3/8 Dimension : inch...
  • Page 67 1. Specifications 1-4. Dimensional Data Indoor Unit : Wall Mounted (Type K1) Drain and wiring port (3-5/32) Refrigerant liquid line (3/8") Flare connection Refrigerant gas line (5/8") Flare connection Drain hose OD 45/64 Dimension : inch 1-59...
  • Page 68 1. Specifications 1-4. Dimensional Data Indoor Unit : Ceiling (Type T1) Type 26 6-3/32 3-15/16 12-7/32 11-1/32 3-3/8 5-3/4 5-9/16 11-1/32 4-9/16 3-9/32 Holes in the rear side (View from front) Hole for wall-through piping (View from front) 5-3/16 2-25/32 48-7/16 (Suspension bolt hole pitch) 1-3/8 50-13/32...
  • Page 69 1. Specifications 1-4. Dimensional Data Indoor Unit : Ceiling (Type T1) Type 36, 42 6-3/32 7-31/32 12-7/32 11-1/32 3-3/8 5-3/4 5-9/16 11-1/32 4-3/4 3-5/32 Holes in the rear side (View from front) Hole for wall-through piping (View from front) 5-3/16 2-25/32 59-1/4 (Suspension bolt hole pitch) 1-3/8...
  • Page 70 1. Specifications 1-4. Dimensional Data Indoor Unit : Low Silhouette Ducted (Type F1) Type 26 7-15/32 31/32 6-5/16 1-3/16 2-3/4 13/32 24-13/16 31/32 3-11/32 4-17/32 10-1/4 15/16 (Air outlet duct flange) 22-27/32 31/32 (Suspension bolt pitch) Dimension : inch Refrigerant liquid line (3/8") Flare connection Refrigerant gas line (5/8") Flare connection Upper drain port (O.D.
  • Page 71 1. Specifications 1-4. Dimensional Data Indoor Unit : Low Silhouette Ducted (Type F1) Type 36 7-15/32 6-5/16 31/32 1-3/16 2-3/4 13/32 31/32 24-13/16 3-11/32 4-17/32 10-1/4 15/16 (Air outlet duct flange) 22-27/32 31/32 Dimension : inch (Suspension bolt pitch) Refrigerant liquid line (3/8") Flare connection Refrigerant gas line (5/8") Flare connection Upper drain port (O.D.
  • Page 72 1. Specifications 1-4. Dimensional Data Indoor Unit : Low Silhouette Ducted (Type F1) Flange for the air intake duct (Field supply) : For Concealed Ducted Type Thickness more than T1/16 inch 8-9/32 31/32 12-1/32 31/32 10-1/4 (O.D.) 29/32 13/32 5/16 1-25/32 7-7/8 1-25/32...
  • Page 73 1. Specifications 1-4. Dimensional Data Indoor Unit : 4-Way Cassette 36” × 36” (Type U2) Note: For DC Fan Motor Tap Setting procedure for Preparation for Suspending 4-Way Cassette 36” × 36”, see page 1-157. This unit uses a drain pump. Use a carpenter’s level to check that the unit is level.
  • Page 74 1. Specifications 1-4. Dimensional Data Indoor Unit : Wall mounted (Type K2) 1-66...
  • Page 75 1. Specifications 1-4. Dimensional Data Unit: inch (mm) Indoor Unit : Cealing (Type T2) Required Minimum Space for Installation and Service Air intake Dimensions of suspension bolt pitch and unit Length Type inch 48-17/64 50-13/64 9-1/4 1226 1275 inch 62-43/64 62-19/32 9-1/4 36, 42...
  • Page 76 1. Specifications 1-4. Dimensional Data Outdoor Unit: U-26PE1U6, U-26PS1U6 U-36PE1U6, U-36PS1U6 1-68...
  • Page 77 1. Specifications 1-4. Dimensional Data Outdoor Unit: U-42PE1U6, U-42PS1U6 1-69...
  • Page 78 1. Specifications 1. Specifications Refrigerant Flow Diagram 1-5. Refrigerant Flow Diagram Outdoor Unit : U-26PE1U6, U-26PS1U6 Indoor Unit : 26, 30, 36 Types Outdoor Unit : U-26PE1U6, U-26PS1U6 Indoor Unit : Type 26, 30, 36 U-36PE1U6, U-36PS1U6 U-36PE1U6, U-36PS1U6 Ø5/8 in.
  • Page 79: Refrigerant Flow Diagram

    1. Specifications 1. Specifications 1-5. Refrigerant Flow Diagram 1-5 Refrigerant Flow Diagram Outdoor Unit: U-42PE1U6, U-42PS1U6 Indoor Unit: Type 42 Outdoor Unit: U-42PE1U6, U-42PS1U6 Indoor Unit: 42 Type Ø5/8 in. (Ø15.88) Ø3/8 in. (Ø9.52) 1-6. Operating Range 1-6 Operating Range Temperature Indoor Air Intake Outdoor Air Intake...
  • Page 80: Capacity Correction Graph According To Temperature Condition

    1. Specifications 1-7. Capacity Correction Graph According to Temperature Condition U-26PE1U6, U-26PS1U6 U-36PE1U6, U-36PS1U6 U-42PE1U6, U-42PS1U6 1-72...
  • Page 81: Noise Criterion Curves

    1. Specifications 1-8. Noise Criterion Curves Concealed Duct (Type F2) : S-36PF2U6 MODEL : S-26PF2U6 MODEL SOUND LEVEL : HIGH 35 dB(A), NC 29/ LOW 26 dB(A), NC 20 SOUND LEVEL : HIGH 39 dB(A), NC 33/ LOW 31 dB(A), NC 24 CONDITION : 4.9 ft.
  • Page 82 1. Specifications 1-8. Noise Criterion Curves 4-Way Cassette (Type U1) MODEL : S-36PU1U6 MODEL : S-26PU1U6 SOUND LEVEL : HIGH 44 dB(A), NC 37 SOUND LEVEL : HIGH 38 dB(A), NC 31 33 dB(A), NC 25 31 dB(A), NC 23 : 4.9 ft.
  • Page 83 1. Specifications 1-8. Noise Criterion Curves Wall Mounted (Type K1) S-26PK1U6 CONDITION : Distance 3.3 ft., Under the unit 3.3 ft. SOURCE : 208 - 230 V, 1 Phase, 60 Hz 1-75...
  • Page 84 1. Specifications 1-8. Noise Criterion Curves Ceiling (Type T1) MODEL : S-26PT1U6 MODEL : S-36PT1U6 SOUND LEVEL : HIGH 40 dB(A), NC 34 SOUND LEVEL : HIGH 46 dB(A), NC 39 36 dB(A), NC 26 37 dB(A), NC 31 CONDITION : Distance 3.3 ft., Under the unit 3.3 ft.
  • Page 85 1. Specifications 1-8. Noise Criterion Curves Low Silhouette Ducted (Type F1) MODEL : S-26PF1U6 MODEL : S-36PF1U6 SOUND LEVEL : HIGH 34 dB(A), NC 22 / LOW 27 dB(A), NC 18 SOUND LEVEL : HIGH 38 dB(A), NC 30 / LOW 31 dB(A), NC 21 : 4.9 ft.
  • Page 86 1. Specifications 1-8. Noise Criterion Curves 4-Way Cassette 36” × 36” (Type U2) High : S-26PU2U6 : S-36PU2U6 MODEL MODEL 44 dB(A) SOUND LEVEL : High 37 dB(A) SOUND LEVEL : High 28 dB(A) 32 dB(A) CONDITION : Under the unit 4.9 ft. CONDITION : Under the unit 4.9 ft.
  • Page 87 1. Specifications 1-8. Noise Criterion Curves Wall Mounted (Type K2) High : S-26PK2U6 MODEL : High 48 dB(A) SOUND LEVEL 38 dB(A) : Distance 3.3 ft., Under the unit 3.3 ft. CONDITION SOURCE : 208-230V, 1 Phase, 60Hz NC-70 NC-60 NC-50 NC-40 NC-30...
  • Page 88 1. Specifications 1-8. Noise Criterion Curves Ceiling (Type T2) High : S-36PT2U6 : S-26PT2U6 MODEL MODEL SOUND LEVEL : High 39 dB(A) SOUND LEVEL : High 42 dB(A) 31 dB(A) 35 dB(A) CONDITION CONDITION : 3.3 ft. from front of outlet at height of 3.3 ft. : 3.3 ft.
  • Page 89 1. Specifications 1-8. Noise Criterion Curves Outdoor Units U-26PE1U6, U-26PS1U6 U-36PE1U6, U-36PS1U6 U-26PE1U6, U-26PS1U6 U-36PE1U6, U-36PS1U6 U-42PE1U6, U-42PS1U6 U-42PE1U6, U-42PS1U6 REMARKS: 1. Value obtained in the actual place where the unit is installed may be slightly higher than the values shown in this graph because of the conditions of operation, the structure of the building, the background noise and other factors.
  • Page 90: Increasing The Fan Speed

    1. Specifications 1-9. Increasing the Fan Speed Low Silhouette Ducted (Type F1) Electrical component box If external static pressure is too great (due to long extension Jumper cable of ducts, for example), the air flow volume may drop too low Jumper cable motor at each air outlet.
  • Page 91: External Static Pressure Setting

    1. Specifications 1-10. External Static Pressure Setting Concealed Duct (Type F2) For concealed duct type indoor units, the ventilating resistance so-called “external static pressure” becomes greatly different depending on the connected duct length, shape, number of air outlet ports and types of filters. When installing this unit, be sure to carry out the external static pressure setting in order to operate in the rated airflow volume.
  • Page 92 1. Specifications 1. Specifications NOTE Check the following items before performing the setting-check operations or auto airflow volume operations. Check to make sure that the electrical wiring and ducting have been completed. Activate the stand-by mode. In particular, make sure that the closed damper located in the middle of the duct is open, if installed. Also, make sure that air filters have been installed inside the air inlet duct.
  • Page 93 1. Specifications 1-10-1. How to Set on PC Board Table 1-1 Selection of connected short- 1. Turn off the power breaker to halt the supply of electricity to the circuit pins PC board. External static pressure 2. Open the lid of electrical equipment box and check where the short- at the time of rated Short-circuit pin circuit pin on the indoor unit control PC board is located (Fig.
  • Page 94 1. Specifications 1-10-3. Operating the High-spec Wired Remote Controller (CZ-RTC3 / CZ-RTC5) Detailed settings 20:30 (THU) Unit no. Code no. Set data 0001 20:30 (THU) Sel. Next Select the “Set data” by pressing the START button. Select one of the “Set data” among “0001” – “0015” according to the desired external static pressure setting by pressing the button.
  • Page 95 1. Specifications Auto External Static Pressure Setting Operation Keep pressing the buttons Press the button. Test run will be started. simultaneously for 4 or more seconds. Test run setting mode screen appears on the LCD display. The “Maintenance func” screen appears on the LCD display. 20:30 (THU) Maintenance func 20:30 (THU)
  • Page 96: Indoor Fan Performance

    1. Specifications Indoor Fan Performance Item code “ ” M M M M M M M L L L L L L L L L L L L 1 -2 1 -3 Type 36 Type 26 in.WC (Pa) in.WC (Pa) PQ diagram PQ diagram 0.72...
  • Page 97: Air Throw Distance Chart

    1. Specifications 1-11. Air Throw Distance Chart 4-Way Cassette (Type U1) Type 26 HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY 2111_X_I Type 36, 42 HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY 2112_X_I : LOUVER ANGLE 20˚ in Cooling mode : LOUVER ANGLE 60˚ in Heating mode Condition Fan Speed : Hi Room air temp.
  • Page 98 1. Specifications 1-11. Air Throw Distance Chart Wall Mounted (Type K1) Type 26 Horizontal distance (ft.) COOLING - - - - - HEATING FAN SPEED HIGH HIGH ROOM AIR TEMP. 80°F 70°F FLAP ANGLE 0°, 22.5°, 45° 45°, 67.5° 1-90...
  • Page 99 1. Specifications 1-11. Air Throw Distance Chart Ceiling (Type T1) Type 26 HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY 2115_T_I Type 36 HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY 2116_T_I Type 42 HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY COOLING HEATING FAN SPEED HIGH HIGH ROOM AIR TEMP.
  • Page 100 1. Specifications 1-11. Air Throw Distance Chart 4-Way Cassette 36”× 36” (Type U2) Type 26 Heating : Distribution of wind velocity (Strong wind : Discharge angle approx.65 ) (Room temperature approx.70°F) 59in/s 39in/s 20in/s 12in/s Horizontal air flow distance (in.) Heating : Distribution of temperature (Strong wind : Discharge angle approx.65 ) (Room temperature approx.70°F)
  • Page 101 1. Specifications 1-11. Air Throw Distance Chart 4-Way Cassette 36”× 36” (Type U2) Type 36, 42 Heating : Distribution of wind velocity (Room temperature approx.70°F) (Strong wind : Discharge angle approx.65 ) 59in/s 39in/s 20in/s 12in/s Horizontal air flow distance (in.) Heating : Distribution of temperature (Strong wind : Discharge angle approx.65 ) (Room temperature approx.70°F)
  • Page 102 1. Specifications 1-11. Air Throw Distance Chart Wall Mounted (Type K2) Type 26 Heating : Distribution of wind velocity (Strong / Outlet Angle=60 ) (Rm. temp. 68°F) 4.9 ft/s 2.9 ft/s 0.98 ft/s 3.9 ft/s 2.0 ft/s 0.98 ft/s 13.1 16.4 Horizontal air flow distance (ft.) Heating : Distribution of temperature...
  • Page 103 1. Specifications 1-11. Air Throw Distance Chart Ceiling (Type T2) Type 26 Heating : Distribution of wind velocity (Strong wind : Discharge angle approx.54 ) (Room temperature approx.70°F) 59in/s 39in/s 20in/s 12in/s 79 118 157 197 236 276 315 354 394 Horizontal air flow distance (in.) Heating : Distribution of temperature (Strong wind : Discharge angle approx.54 )
  • Page 104 1. Specifications 1-11. Air Throw Distance Chart Ceiling (Type T2) Type 36, 42 Heating : Distribution of wind velocity (Strong wind : Discharge angle approx.54°) (Room temperature approx.70°F) 59in/s 39in/s 20in/s 12in/s Horizontal air flow distance (in.) Heating : Distribution of temperature (Strong wind : Discharge angle approx.54°) (Room temperature approx.70°F) 91°F...
  • Page 105: Electrical Wiring

    Recommended Wire Length and Wire Diameter for Power Supply System You must follow LOCAL ELECTRICAL CODES for wiring. Outdoor Unit Time delay fuse or Time delay fuse or Type Type circuit capacity circuit capacity U-26PE1U6 30 A U-26PS1U6 25 A U-36PE1U6 35 A U-36PS1U6 30 A U-42PE1U6...
  • Page 106 1. Specifications Wiring System Diagrams Basic wiring diagram for standard control Outdoor unit INV unit Inter-unit power line Power supply Indoor 208 / 230 V, 60 Hz, 1PH 208 / 230 V, 60Hz, 1PH unit Grounding Wire Power supply 208 / 230 V, 60Hz, 1PH Grounding Wire Ground Remote Controller...
  • Page 107 1. Specifications Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also occur. WARNING Therefore, ensure that all wiring is tightly connected. When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the terminal” and fasten the wire securely with the fixing screw of the terminal board.
  • Page 108: Installation Instructions

    15 – 100 ft. Additional charge per 1 ft. 0.43 oz. If outdoor unit is higher Maximum indoor-outdoor height difference If outdoor unit is lower Table 1-4 Tubing Data for Models U-26PE1U6 U-36PE1U6 U-42PE1U6 Models Tubing Data U-26PS1U6 U-36PS1U6 U-42PS1U6 Liquid tube in.
  • Page 109: Check Of Density Limit

    1. Specifications 1. This unit requires no additional refrigerant charge up to 100 ft. tubing length. In case of more than 100 ft., additional refrigerant charge is required. Refer to Table CAUTION 1-5. 2. In case of multi type installation, indoor units should be installed within the same room.
  • Page 110: Selecting The Installation Site

    1. Specifications 3. SELECTING THE INSTALLATION SITE 3-1. Outdoor Unit Exhaust fan AVOID: heat sources, exhaust fans, etc. (Fig. 1-5) Hot air damp, humid or uneven locations Heat source Out- door choose a place as cool as possible. unit choose a place that is well ventilated and outside air temperature does not exceed maximum 115°F constantly.
  • Page 111 1. Specifications 3-2. Air-Discharge Chamber for Top Discharge Be sure to install an air discharge chamber in the Air discharge field when: it is difficult to keep a space of min. 20" between the air discharge outlet and an obstacle. Air discharge the air discharge outlet is facing a sidewalk and discharged hot air may bother passers-by.
  • Page 112 1. Specifications 3-5. Dimensions of Wind Ducting Reference diagram for air-discharge chamber (fi eld supply) For U-26PE(S)1U6 / U-36PE(S)1U6 unit ① Air discharge chamber ② Air discharge chamber (base) 21-13/16 (25/32) (25/32) Rectangular hole (both sides) 5-5/32 9-27/32 9-27/32 1-1/16 21-13/16 15/16 17/32 Unit: inch...
  • Page 113 1. Specifications Dimensions of Outdoor Unit with air-discharge chamber (fi eld supply) U-26PE(S)1U6 / U-36PE(S)1U6 unit 6-11/16 4-5/16 25-31/32 Wind direction 2-17/32 21-13/16 9-7/8 Wind direction Wind direction Unit: inch U-42PE(S)1U6 unit 4-5/16 6-11/16 25-31/32 Wind direction 2-11/36 21-13/32 11-13/16 Wind direction Wind Wind...
  • Page 114 1. Specifications Reference diagram for air-discharge chamber (fi eld supply) U-26PE(S)1U6 / U-36PE(S)1U6 / U-42PE(S)1U6 Required space around outdoor unit If the air discharge chamber is used, the space shown below must be secured around the outdoor unit. If the unit is used without the required space, a protective device may activate, preventing the unit from operating. (1) Single-unit installation Unit: inch The top and both sides must remain open.
  • Page 115 1. Specifications 3-6. Dimensions of Snow Ducting Reference diagram for snow-proof vents (fi eld supply) For U-26PE(S)1U6 / U-36PE(S)1U6 unit ① 30-3/32 Unit top, snow-proof vent ② Unit left side ③ Unit right side ④ Unit reverse side ⑤ Unit reverse side ⑥...
  • Page 116 1. Specifications Dimensions of outdoor unit with snow-proof vents (fi eld supply) U-26PE(S)1U6 / U-36PE(S)1U6 unit 30-5/64 7-3/64 Wind direction Wind direction Wind direction Wind direction 11-57/64 37-1/64 Wind direction Wind direction Unit: inch U-42PE(S)1U6 unit 30-5/64 7-3/64 Wind direction Wind direction Wind direction Wind direction...
  • Page 117 1. Specifications Reference diagram for snow-proof vents – 1 Space requirements for setting – (1) U-26PE(S)1U6 / U-36PE(S)1U6 / U-42PE(S)1U6 ] t i ] t i (1) Single-unit installation (2) Obstacles on both sides (1) Single-unit installation Min. B (2) Multiple-unit installation (2 or more units) Min.
  • Page 118 1. Specifications Reference diagram for snow-proof vents – 2 Space requirements for setting – (2) U-26PE(S)1U6 / U-36PE(S)1U6 / U-42PE(S)1U6 [Obstacles to the front and rear of unit] The top and both sides must remain open. Either the obstacle to the front or the obstacle to the rear must be no taller than the height of the outdoor unit.
  • Page 119: How To Install The Outdoor Unit

    1. Specifications 4. HOW TO INSTALL THE OUTDOOR UNIT 4-1. Installing the Outdoor Unit Drain port (2 locations) Use concrete or a similar material to create the base, and ensure good drainage. 6-11/16 4-21/64 25-63/64 Ordinarily, ensure a base height of 2" or more. If a 8-5/8 5-29/32 drain pipe is used, or for use in cold-weather regions,...
  • Page 120 1. Specifications 4-4. HOW TO PROCESS TUBING Deburring The liquid tubing side is connected by a flare nut, and the gas tubing side is connected by brazing. Before After 1. Connecting the Refrigerant Tubing Use of the Flaring Method Many conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units.
  • Page 121 1. Specifications Caution Before Connecting Tubes Tightly (1) Apply a sealing cap or water-proof tape to prevent dust or water from entering the tubes before they are used. Apply refrigerant (2) Be sure to apply refrigerant lubricant to the matching surfaces of the lubricant fl...
  • Page 122 1. Specifications Do not use a spanner to tighten the valve stem caps. Packed valve Doing so may damage the valves. Charging port Depending on the installation conditions, applying excessive torque may cause the nuts to crack. Valve stem Precautions for Packed Valve Operation If the packed valve is left for a long time with the valve stem cap removed, refrigerant will leak from the valve.
  • Page 123 1. Specifications 4. Taping the Tubes (1) At this time, the refrigerant tubes (and electrical wiring if local codes permit) should be taped together with armoring tape in 1 bundle. To Inter-unit Gas tube prevent condensation from overfl owing the drain control wiring Liquid tube pan, keep the drain hose separate from the...
  • Page 124: Additional Refrigerant Charge

    1. Specifications 4-5. LEAK TEST, EVACUATION AND Manifold gauge ADDITIONAL REFRIGERANT CHARGE Perform an air-tightness test for this package A/C. Check that there is no leakage from any of the connections. Air and moisture in the refrigerant system may have undesirable effects as indicated below. pressure in the system rises operating current rises cooling (or heating) effi...
  • Page 125 1. Specifications (3) Pressurize the system up to 4.15 MPa {42 kgf/cm G} with dry nitrogen gas and close the Manifold valve cylinder valve when the gauge reading reaches 4.15 MPa {42 kgf/cm G}. Then, test for leaks with Pressure liquid soap.
  • Page 126 1. Specifications 3. Charging Additional Refrigerant Manifold valve Charging additional refrigerant (calculated from the liquid tube length as shown in Section "1-13. Installation Pressure Instructions, 1. Tubing Size, Table 1-4 Tubing Data for gauge Models", Amount of additional refrigerant charge) using the liquid tube service valve.
  • Page 127: Indoor Unit

    1. Specifications Indoor Unit Ceiling (Type T1) 5. SELECTING THE INSTALLATION SITE Ceiling Ceiling discharge 5-1. Indoor Unit AVOID: Wall Air intake Min. 2 ft. areas where leakage of flammable gas may be Min. 10 inch Min. 10 inch Front view expected.
  • Page 128: How To Install The Indoor Unit

    1. Specifications 6. HOW TO INSTALL THE INDOOR UNIT Unit: inch (mm) Concealed Duct (Type F2) 6-1. Required Minimum Space for Installation and A (Suspension bolt pitch) Electrical Service component box The minimum space for installation and service is shown in Indoor unit Inspection Fig.
  • Page 129 1. Specifications 6-2. Suspending the Indoor Unit Suspension bolt Depending on the ceiling type: • Insert suspension bolts (Fig. 1-34) Nuts and washers (use for upper and lower) • Use existing ceiling supports or construct a suitable support (Fig. 1-35). Suspension lug Hole-in-anchor Concrete...
  • Page 130 1. Specifications Tighten the hose clamps so their locking nuts face upward. (Fig. 1-39) Do not install the pipe with an upward slant from the connection port. This will cause the drain water to flow backward and leak when the unit is not operating. Align the wire of hose band without separating from the drain (Fig.
  • Page 131 1. Specifications 6-4. Connecting Duct filter chamber with middle/ high-performance filter outlet duct (field supply) (field supply) canvas duct (field supply) Intake grille with low-performance - ø5/32” (ø4.1) holes filter (field supply) For 13/64” (M5) self-tapping screw outlet port (field supply) AIR FLOW (1) Install the duct (field supply) to air intake port side.
  • Page 132 1. Specifications 4-Way Cassette (Type U1) 6-5. Suspending the Indoor Unit This unit uses a drain pump. Use a level gauge to check that the unit is level. Hole-in-anchor Hole-in-plug Concrete Insert 6-6. Preparation for Suspending (1) Fix the suspension bolts securely in the ceiling using the method shown in the diagrams (Figs.
  • Page 133 1. Specifications 6-7. Placing the Unit Inside the Ceiling Full-scale installation diagram (1) When placing the unit inside the ceiling, determine (printed on a cardboard packing) the pitch of the suspension bolts using the supplied full-scale installation diagram. (Fig. 1-49) The size of the opening for the indoor unit can be confirmed by attaching the full-scale installation diagram beneath the unit.
  • Page 134 1. Specifications 6-8. Installing the Drain Piping Transparent part for Hose band Adhere with (1) Prepare standard hard PVC pipe for the drain and checking drainage (supplied) PVC adhesive. use the supplied drain hose and hose band to pre- vent water leaks. The PVC pipe must be purchased separately.
  • Page 135 1. Specifications 6-9. Checking the Drainage After wiring and piping are completed, use the follow- ing procedure to check that the water will drain smooth- ly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water. Do not supply power to the WARNING unit until the tubing and wir-...
  • Page 136 1. Specifications Screw Ceiling Panel Latch Never touch or attempt to CAUTION move the air direction louver by hand or you may dam- age the unit. Instead, use the remote controller if you want Air-intake grille to change the direction or air flow.
  • Page 137 1. Specifications 6-11. Installing the Ceiling Panel (1) Lift the ceiling panel and position it to align the panel hook with the panel catch of the indoor unit. NOTE The ceiling panel must be mounted in the correct direction. Note that the 2 catches of the panel differ in size.
  • Page 138 1. Specifications 6-13. Duct for Fresh Air For fresh air intake There is a duct connection part on side of the indoor unit. (Fig. 1-61) Air-intake plenum (including Duct connection box and flange) are attached to the indoor unit when used to take fresh outdoor air.
  • Page 139 1. Specifications (d) Installing the ceiling panel Duct connection flange Attach the ceiling panel to the air-intake plenum. Duct connection box Drawing the panel downwards sets the panel in position temporarily with the panel catch (at 2 locations). Installation screws (M4xL1/2”, 4pcs.) Remove the socket cover of the air-intake plenum and pass the 8P sockets through it.
  • Page 140 1. Specifications Wall Mounted (Type K1) 6-14. Removing the Wall Fixture from the Unit Remove the set screws and take off the rear panel. (Fig. 1-64) NOTE Set screws for transportation only Fig. 1-64 Tubing can be extended in 3 directions as shown in Fig.
  • Page 141 1. Specifications 6-16. Installing the Rear Panel on the Wall Be sure to confirm that the wall is strong enough to suspend the unit. See either Item a) or b) below depending on the wall type. a) If Wooden Wall (1) Attach the rear panel to the wall with the 10 screws pro- Fig.
  • Page 142 1. Specifications 6-17. Removing the Grille to Install the Indoor Unit Grille Air-intake grille Basically, these models can be installed and wired without removing the grille. If access to any internal part is needed, follow the steps given below: How to remove the grille (1) Set the 2 flaps in the horizontal position.
  • Page 143 1. Specifications 6-19. Wiring Instructions General Precautions on Wiring (1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following the wiring diagram. (2) Provide a power outlet to be used exclusively for each unit. A power supply disconnect and circuit breaker for overcurrent protection should be provided in the exclusive line.
  • Page 144 1. Specifications 6-21. Shaping the Tubing Cover Refrigerant (1) Shape the refrigerant tubing so that it can easily go tubing into the hole. (Fig. 1-79) (2) Push the wiring, refrigerant tubing and drain hose Inter-unit through the hole in the wall. Adjust the indoor unit wiring so it is securely seated on the wall fixture.
  • Page 145 1. Specifications Ceiling (Type T1) Front face 6-23. Suspending the Indoor Unit (1) Place the full-scale diagram (supplied) on the ceiling at the spot where you want to install the Rear indoor unit. Use a pencil to mark the drill holes. (Fig.
  • Page 146 1. Specifications (5) Before suspending the indoor unit, remove the 2 Pull out the screws on the latch of the air-intake grilles, open air-Intake grille pushing claws the grilles, and remove them by pushing the claws Hinge of the hinges of the hinges as shown in Fig.
  • Page 147 1. Specifications (7) Suspend the indoor unit as follows. (a) Mount a washer and two hexagonal nuts on each suspension bolt as shown in Fig. 1-92. (b) Lift the indoor unit with a lifting machine to the Ceiling ceiling surface, and place it on the washers surface through the notches, to fix it in place.
  • Page 148 1. Specifications 6-24. Duct for Fresh Air Duct connection port (Knock-out hole) There is a duct connection port (knock-out hole) at the right-rear on the panel top of the indoor unit for drawing in fresh air. If it is necessary to draw in fresh air, remove the cover by knocking it out and connect the duct to the indoor unit through the connection port.
  • Page 149 1. Specifications Low Silhouette Ducted (Type F1) 6-26. Required Minimum Space for Installation and Service Electrical A (Suspension bolt pitch) component box This air conditioner is usually installed above the ceiling so that the indoor unit and ducts are not Inspection access visible.
  • Page 150 1. Specifications 6-27. Suspending the Indoor Unit Hole-in-anchor Hole-in-plug Concrete Insert Depending on the ceiling type: • Insert suspension bolts as shown in Fig. 1-103 • Use existing ceiling supports or construct a suitable support as shown in Fig. 1-104. Suspension bolt (M10 or 3/8") (field supply) It is important that you use...
  • Page 151 1. Specifications Fig. 1-107 shows an example of installation. Bolt anchor Air outlet duct Suspension bolt Air-intake duct Air-outlet grille Ceiling material Indoor unit Air-intake grille Fig. 1-107 6-28. Installing the Drain Piping (1) Prepare standard hard PVC pipe for the drain and Transparent part for Hose band Adhere with...
  • Page 152 1. Specifications Air bleeder CAUTION Do not install an air bleeder tube as this may cause Not good water to spray from the drain pipe outlet. (Fig. 1-110) If it is necessary to increase the height of the drain Fig. 1-110 pipe, the section directly after the connection port can be raised a maximum of 19-11/16".
  • Page 153 1. Specifications 6-30. Increasing the Fan Speed Electrical component box If external static pressure is too great (due to long Booster cable extension of ducts, for example), the air flow volume Booster cable motor may drop too low at each air outlet. This problem may be solved by increasing the fan speed using the Fan motor socket (At shipment)
  • Page 154 1. Specifications 6-31. When Installing the Indoor Unit Confirm that the indoor unit should be installed in a horizontal position. Use the level gauge or vinyl tube and check every four corner of the unit is in horizontal. If the air outlet duct flange is positioned with downward gradient, there is in danger of water splash or drainage.
  • Page 155 1. Specifications SUPPLEMENT ON DRAIN PIPING Checkpoint after installation After installation of indoor and outdoor units, panels and electrical wiring, check the following items. Make sure whether indoor and outdoor units are Fall, vibration, noise correctly installed. 2 Make sure whether gas leakage is tested. No cooling, no heating Make sure whether insulation is completed.
  • Page 156 1. Specifications 4-Way Cassette 36” × 36” (Type U2) 6-33. Selecting the Installation Site Indoor Unit AVOID: areas where leakage of flammable gas may be expected. places where large amounts of oil mist exist. direct sunlight. locations near heat sources which may affect the performance of the unit. locations where external air may enter the room directly.
  • Page 157 1. Specifications 6-34. Preparation for Suspending Note: For DC Fan Motor Tap Setting procedure for This unit uses a drain pump. Use a carpenter’s level to check 4-Way Cassette 36” × 36”, see page 1-157. that the unit is level. Hole-in-anchor Hole-in-plug Insert...
  • Page 158 1. Specifications 6-36. Placing the Unit Inside the Ceiling This unit is equipped with the drain pump. Check a tape measure or carpenter’s level. Ceiling Before installing the ceiling panel, complete the work of conditioner drain pipe and refrigerant pipe installation. (1) When placing the unit inside the ceiling, determine the pitch of the suspension bolts using the supplied full-scale Full-scale...
  • Page 159 1. Specifications 6-38. Installing the Drain Pipe 1. Before Performing the Installation Drain Piping 1 ft. (300 mm) or less (as short as possible) (1) Limitations of Raising the Drain Pipe Connection Indoor unit CAUTION A : 2.79 ft. (850 mm) or lower Ceiling surface B : 2.2 ft.
  • Page 160 1. Specifications 2. Installing the Drain Hose CAUTION Do not apply force to the drain port when connecting the 3) Move the hose band so that the center position of the hose drain hose. Install and fix it near the indoor unit as close as band can be placed approx.
  • Page 161 1. Specifications 6-39. Checking the Drainage Be careful because the fan will start when you short the pin on the indoor control board. After wiring (refer to “1-12. ELECTRICAL WIRING”.) and drain piping are completed, use the following procedure to check that the water will drain smoothly.
  • Page 162 1. Specifications 6-40. General Precautions on Wiring (1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following the wiring diagram. WARNING (2) This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD).
  • Page 163 1. Specifications 6-42. How to Install the Ceiling Panel (3) Installing the ceiling panel The power must be turned ON in order to change the flap angle. (Do (1) Removing the air-intake grille not attempt to move the flap by hand. Doing so may damage the flap.) 1) Remove the 2 screws on the latch of the air-intake grille.
  • Page 164 1. Specifications (5) How to Attach the Corner & Air-Intake Grille CAUTION A. Attaching the corner cover 1) Check that the safety cord from the corner cover is fastened If the screws are not sufficiently tightened, trouble such to the ceiling panel pin, as shown in the figure below. as that shown in the figure below may occur.
  • Page 165 1. Specifications 6-43. Others (1) Checking After Installation 1) Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling surface. * Gaps may cause water leakage and condensation. 2) Check that the wiring is securely connected. * If it is not securely connected, the auto flap will not operate.
  • Page 166 1. Specifications <Procedure of CZ-RTC3 /CZ-RTC5> Stop the system before performing these steps. 1 Keep pressing the buttons simultaneously for 4 or more seconds. The “Maintenance func” screen appears on the LCD display. 6 Press the button. The “Exit detailed settings and restart?” (Detailed setting- end) screen appears on the LCD display.
  • Page 167 1. Specifications (4) Setting the Flap Separately 5 Press the timer time buttons to select the 1) The 4-air outlet flap can be adjusted separately during desired setting data. operation. When not adjusted separately, all flaps operate Flap position in the same manner. Air discharge port Flap...
  • Page 168 1. Specifications <Procedure of CZ-RTC3 /CZ-RTC5> Stop the system before performing these steps. 1 Keep pressing the buttons simultaneously for 4 or more seconds. The “Maintenance func” screen appears on the LCD display. 2 Press the button to see each menu. If you wish to see the next screen instantly, press the button.
  • Page 169 1. Specifications When the flap position is set to and the unit is in the cooling or dry mode, the flap position is moved to and the operation is started. (refer to Fig. 1-143) NOTE If you wish to change the selected indoor unit, follow the The flap swings during the operation under “Setting the step 2.
  • Page 170 1. Specifications 6-44. Accessories Supplied with Unit (4-Way Cassette 36” × 36”) Part Name Figure Q’ty Remarks Part Name Figure Q’ty Remarks For suspension Full-scale Washer bolts installation Card board diagram For full-scale Screw installation diagram Part Name Figure Q’ty Remarks Insulating For gas and liquid...
  • Page 171 1. Specifications Wall Mounted (Type K2) 6-45. Remove the Rear Panel from the Unit (1) Remove and discard the set screw on the rear panel. (Fig. 1-144) (2) Press the 2 marks on the frame cover and disengage the stationary tabs from the frame. (Fig. 1-145) (3) Remove the rear panel by grasping the sections shown in Fig.
  • Page 172 1. Specifications (4) Using a sabre saw, keyhole saw or hole-cutting drill NOTE attachment, cut a hole in the wall. See Table 1-15 and Hole should be made at a slight downward slant to the outdoor Fig. 1-150. side. Indoor Table 1-15 Outdoor side...
  • Page 173 1. Specifications 6-48. Removing and Installing the Grille Front panel Basically, these models can be installed and wired without removing the grille. If access to any internal part is needed, follow the steps as given below. How to remove the grille (1) Open the front panel until it is nearly horizontal, grasp the sections near the front panel arms on both sides, and then remove the panel by pushing the arms towards the outside...
  • Page 174 1. Specifications 6-49. Shape the Indoor Side Tubing (1) Arrangement of tubing by direction Grille a) Right or left tubing Cut out the corner of the right/left frame with a hacksaw or the like. (Figs. 1-162 and 1-163) b) Right-rear or left-rear tubing Left tubing In this case, the corner of the frame need not be cut.
  • Page 175 1. Specifications 6-51. Mounting (1) To install the indoor unit, mount the indoor unit onto the 3 tabs on the upper part of the rear plate. (2) Hold down the air discharge outlet and press the lower part of the indoor unit until it clicks to securely fasten to the 2 tabs on the lower part of the rear plate.
  • Page 176 1. Specifications 6-53. Left-side tubing (1) Lead the tubing and drain hose through the wall, allowing sufficient length for connection. Then bend the tubing using a tube bender to make the attachment. (Fig. 1-171) Rear panel (2) Switch the drain hose and drain cap. Hole in wall Switching drain hose and drain cap (a) Locate the drain hose and the drain cap.
  • Page 177 1. Specifications To unmount indoor unit (1) Remove the screw cover on the bottom surface. (Fig. 1-176) (2) Fasten the frame to the rear panel using the 2 supplied tapping screws 5/32 × 13/32" (4 × 10 mm). (Fig. 1-176) Screw (3) Press the 2 marks on the lower part of the indoor unit...
  • Page 178 1. Specifications Ceiling (Type T2) Ceiling Ceiling 6-55. Selecting the Installation Site Indoor Unit AVOID: Wall areas where leakage of flammable gas may be expected. places where large amounts of oil mist exist. min. 0.83ft. (250mm) min. 0.83ft. (250mm) Front view direct sunlight.
  • Page 179 1. Specifications Unit: inch (mm) 6-56. Required Minimum Space for Installation and Service (1) Dimensions of suspension bolt pitch and unit Air intake Length Type inch 48-17/64 50-13/64 9-1/4 1226 1275 inch 62-43/64 62-19/32 9-1/4 36, 42 1541 1590 (Suspension bolt pitch) Air discharge Fig.
  • Page 180 1. Specifications 6-57. Preparation Before Installation (4) Remove the center bracket. When wiring, remove the center bracket if necessary. When (1) Remove the bracket (for suspending the indoor unit). wiring is completed, reinstall the center bracket in its original Loose the M8 or 5/16” suspension bolts. position.
  • Page 181 1. Specifications WARNING b) Suspend the indoor unit to the bracket. Tighten the M8 or 5/16” suspension bolts and fix the indoor It is important that you use extreme care in supporting the unit in place. (Fig. 1-197) indoor unit from the ceiling. Ensure that the ceiling is strong enough to support the weight of the unit.
  • Page 182 1. Specifications * If the drain hose is routed through the left side, refer to Fig. 1-198, NOTE and follow the procedure above to install the hose. The hole should be made at a slight downward slant to the Reattach the rubber stopper removed earlier onto the right side. outside.
  • Page 183 1. Specifications 6-62. Final Procedure 6-63. Accessories Supplied with Unit (Ceiling) Reinstall the removed part to be placed in its original position. (See the section “6-57. Preparation Before Installation”.) Part Name Figure Q’ty Remarks Then install the accessory supplied side covers (L/R) on both For temporarily Special sides of the indoor unit.
  • Page 184: How To Install The Wireless Remote Controller

    1. Specifications 7. HOW TO INSTALL THE WIRELESS REMOTE CONTROLLER IMPORTANT When using this air conditioner with the wireless remote controller it may sometimes be impossible to change the operation modes while other indoor unit is running. When this happens, a double beep tone sounds, the (operation lamp) lights up, and the (Timer lamp) and (Standby lamp) blink alternately.
  • Page 185 1. Specifications 7-2. Room Temperature Sensor Setting The room temperature sensors are built into the indoor unit and the wireless remote controller. Either of these room temperature sensors can operate. The system is shipped from the factory set to the indoor unit sensor. To switch to the remote control sensor, press the sensor switching button located inside the remote control cover and check that A/C SENSOR on the LCD display panel goes out.
  • Page 186 1. Specifications <CZ-RWSU1U> 4-Way Cassette Type (Type U1) Air intake grille 7-5. Indicator Section Installation Mark section Remove the ceiling panel and indicator cover and (indicator section) install the indicator section. (1) Remove the ceiling panel. (2) Remove the corner cover behind the mark section. (3 screws) Ceiling panel (3) Remove the mark section inside the ceiling panel.
  • Page 187 1. Specifications Ceiling (Type T1) 7-7. Indicator Section Installation Remove the side panel to install the indicator section. (Fig. 1-214) Indicator section Panel Side panel Indicator section Cover B (1) Remove the side panel. (Not used when Open the air intake grille, remove the screw at the indicator section is installed.) one place and then remove the side panel by...
  • Page 188 1. Specifications 7-9. Electrical Wiring Signal receiving unit Indoor PCB Operating controller Indicator section (0.7 ft.) (4.3 ft.) W1 (4.3 ft.) Relay connector Fig. 1-216 Connection method (1) Connect W1 to the indoor PCB WL connector. (2) Connect W3 from the indicator section with W2 from the operating controller using the relay connector. 7-10.
  • Page 189 1. Specifications 7-11. Misoperation Alarm Indicators Alarm indicator lamps on the indoor unit indicate the error cause if the air conditioner fails to operate upon being switched on. The possible alarm indications are given in Table 1-16. Fig. 1-218 shows the location of the alarm lamps on the indoor unit.
  • Page 190 1. Specifications CZ-RWSU3U 7-12. Supplied Accessories Supplied Accessories Wireless Remote Remote Control AAA Size Operating Wood Screw Clamper Controller Holder Battery Instructions 7-13. Installing the Receiver The receiver can only be installed on the corner indicated in Fig. 1-219. Consider how the panel will face when it is installed on the indoor unit.
  • Page 191 1. Specifications 7-14. Wiring for the Receiver Wiring Diagram Receiver PCB Indoor unit CN001 Terminals for RC wiring 2P White How to Connect the Wires Connect the wires from the receiver to the terminals for RC wiring on the indoor unit. (No polarity) 7-15.
  • Page 192 1. Specifications CZ-RWST2U 7-17. Supplied Accessories Supplied Accessories Wireless Remote Remote Control AAA Size Operating Wood Screw Clamper Controller Holder Battery Instructions 7-18. Installing the Receiver 1 Open the air inlet grill on the side panel. Remove the 1 screw and move it toward the front (in the direction of an arrow) to remove it.
  • Page 193 1. Specifications 7-19. Self-diagnostics Table and Detected Contents The “Alarm Display” shown in the table below expresses the alarm contents displayed when the wired remote controller is connected. For how to handle the alarms, see installation instructions of indoor units or technical guide. Detected contents Indication lamp on the receiver Alarm Display...
  • Page 194 1. Specifications <CZ-RWSC1U> If the signal receiving unit is installed near a rapid-start or inverter type fluorescent CAUTION lamp (neither one uses glow lamps), it may be impossible to receive signals from the wireless remote controller. To avoid signal interference from fluorescent lamps, install the receiving unit at least 6.6 ft.
  • Page 195 1. Specifications When using the signal receiving unit on a wall with the front exposed, choose a wall surface that the Run the remote con Clamp (Supplied) signal receiving unit can be mounted on. cable through a notch About 3/32"-1/8" in the upper case.
  • Page 196 1. Specifications 7-21. Electrical Wiring Be sure to do the wiring CAUTION correctly (incorrect wiring will damage the equipment). Recommended wire diameter and allowable length for signal receiving unit wiring and its branch wiring: AWG #18, MAX 1,300 ft. Terminal board for indoor unit Signal receiving remote control...
  • Page 197 1. Specifications 7-23. Misoperation Alarm Indicators A blinking lamp for other than the signal receiving unit Service connector fi lter shows that a problem has occurred in the unit, so make an inspection. (Refer to servicing information in the service manual, etc.) Also, if wired remote controller and dedicated service check lines (CV6380230938: service use) are available, then detailed error information can be obtained by connecting to the...
  • Page 198 1. Specifications 7-24. Basic Wiring Diagram Be sure to do the wiring In case of using shielded wires for inter-unit control CAUTION wiring, ground the shield on one side. (Fig. 1-240) correctly (incorrect wiring Otherwise misoperation because of electrical noise will damage the equipment).
  • Page 199 1. Specifications 7-25. Wiring System Diagram for Group Control This diagram shows when several units (maximum of 8) are controlled by a signal receiving unit (main unit). In this case, a signal receiving unit can be connected at any indoor unit. Wiring procedure Wire according to the diagram at left: Address setting is executed automatically when the...
  • Page 200 1. Specifications 7-26. Wiring System Diagram for Multiple Remote Controllers When installing multiple remote controllers This multiple system is used for operating the unit(s) at different positions. (A maximum of 2 signal receiving units can be installed.) Setting method To execute this control, make the setting according to the following procedure.
  • Page 201 1. Specifications <CZ-RWSK1U> 7-27. Test Run Procedure Wall Mounted (Type K1) Check the “Check Items Before the Test Run”. (Item 7-28) Verify the combination (wiring) of indoor and outdoor units. Set the indoor unit controller to “TEST”. (Item 7-29-3) Check using the Diagnosis Is operation function table.
  • Page 202 1. Specifications 7-29. Preparing for the Test Run 7-29-1. Changing the room temperature sensor Room temperature sensors are installed inside the indoor unit and the wireless remote controller. Either room temperature sensor can be used. When “Unit Sensor” is indicated on the wireless remote controller’s LCD, the indoor unit sensor is operating as the room temperature sensor.
  • Page 203 1. Specifications 7-30. Precautions Request that the customer be present at the time the test run is performed. Explain the Operating Instructions to the customer, and then have the customer actually operate the system. Be sure to pass the manual and warranty certifi cate to the customer. Verify that the AC 208 / 230 V wiring is not connected to the terminal plate which is used to connect the inter-unit control wiring.
  • Page 204 1. Specifications 7-31. When Setting Indoor Unit Control PCB Switch for Wall Mounted Indoor Unit When using both the wired and wireless remote controller, refer to the procedure below. If this setting is not made correctly an alarm will occur. (The operation lamp on the display blinks.) This setting is not necessary for the case of using wireless remote controller only.
  • Page 205 1. Specifications 1-197...
  • Page 206: How To Install The Timer Wired Remote Controller

    1. Specifications 8. HOW TO INSTALL THE TIMER WIRED REMOTE CONTROLLER NOTE Refer to the Instruction Manual attached to the Timer Remote Controller. 1-198...
  • Page 207: Section 2: Processes And Functions

    2. PROCESSES AND FUNCTIONS 2-1. Room Temperature Control ..................2-2 2-2. Cold Draft Prevention (Heating Cycle) ................ 2-4 2-3. Automatic Fan Speed (Indoor Unit) ................2-5 2-4. Control Functions ......................2-6 2-5. Outdoor Unit Control PCB ................... 2-9 2-6. Outdoor Unit Control PCB (CR-CH4272R) ..............2-10...
  • Page 208: Room Temperature Control

    2. Processes and functions 2-1. Room Temperature Control The unit adjusts room temperature by turning the outdoor unit’s compressor ON and OFF. This process is controlled by the thermostat located in the remote control unit. The figures on this and the next pages show how each part of the system performs when the room temperature changes and the thermostat activates the compressor to start (thermo ON) or stop (thermo OFF).
  • Page 209 2. Processes and functions (B) Heating THERMO. ON THERMO. ON REMOTE CONTROL THERMO. OFF THERMO. OFF SENSOR (Only for wireless THERMO. ON remote controller) SET. +2 °F SETTING TEMP. SET. –2 °F THERMO. OFF THERMO. OFF BODY SENSOR THERMO. ON THERMO.
  • Page 210: Cold Draft Prevention (heating Cycle)

    2. Processes and functions 2-2. Cold Draft Prevention (Heating Cycle) The cold draft prevention function controls indoor fan speed so a strong draft of cold air will not blow out before the indoor heat exchange coils have warmed up. STANDBY shows on the remote controller when the indoor fan speed is LL (very low) or OFF.
  • Page 211: Automatic Fan Speed (indoor Unit)

    2. Processes and functions 2-3. Automatic Fan Speed (Indoor Unit) By pressing the FAN SPEED button on the remote controller, the fan speed can be set at one of four steps: AUTO., HI., MED., or LO. When set at AUTO. the indoor unit fan speed will be automatically adjusted to the room temperature as the two charts shown below.
  • Page 212: Control Functions

    2. Processes and functions (2) If the outdoor heat exchanger temperature (C1) is 2-4. Control Functions 75°F or higher continuously for 5 minutes, fan Electronic control valve control operation may stop (same conditions as when the Opening of the electronic control valve is controlled so thermostat is OFF).
  • Page 213 2. Processes and functions Overcurrent protection control Heating high-load control The below control is performed during heating operation, (1) If the overcurrent protection circuit detects based on the indoor heat exchanger temperature MAX abnormal current, the compressor is stopped. (Error (E1,E2).
  • Page 214 2. Processes and functions Defrost control Defrost control Defrost sequence Heating operation (25-minute mask) Frost detection Defrost start (reverse cycle defrost) • Operating frequency: 61.8 Hz • Outdoor unit fan: OFF Defrost in progress • Electronic control valve: step 300 •...
  • Page 215: Outdoor Unit Control Pcb

    2. Processes and functions 2. Processes and functions 2-5. Outdoor Unit Control PCB (1) Layout Diagram (CR-CH4872R) Suction temperature (TS) sensor Outdoor air temperature (TO) sensor Heat exchanger temperature (C1) sensor Compressor discharge temperature (TD) sensor Heat exchanger temperature (C2) sensor EEPROM IC Refrigerant recovery switch (S005)
  • Page 216: Outdoor Unit Control Pcb (cr-ch4272r)

    2. Processes and functions 2-6. Outdoor Unit Control PCB (CR-CH4272R) (1) Explanation of Functions S001 Push-button switch (black): Automatic address setting switch • If the system address switch (S002: set to 0 at time of shipment) setting is other than "0"...
  • Page 217 2. Processes and functions Terminal plug 3P plug (black): Terminal plug for the communications line (CN015) • At the time of shipment from the factory, the short-circuiting socket (2P, black) is installed between pins 1 and 2 on the terminal plug (terminal = yes). •...
  • Page 218 - MEMO - 2-12...
  • Page 219: Section 3: Electrical Data

    3. ELECTRICAL DATA 3-1. Indoor Units ........................3-2. Outdoor Units ......................3 -14...
  • Page 220: Indoor Units

    3. Electrical data 3-1. Indoor Units Concealed Duct Type : S-26PF2U6, S-36PF2U6...
  • Page 221 3. Electrical data 4-Way Cassette Type : S-26PU1U6, S-36PU1U6, S-42PU1U6...
  • Page 222 3. Electrical data 4-Way Cassette Type : S-26PU1U6, S-36PU1U6, S-42PU1U6...
  • Page 223 3. Electrical data Wall Mounted Type : S-26PK1U6...
  • Page 224 3. Electrical data Wall Mounted Type : S-26PK1U6...
  • Page 225 3. Electrical data Ceiling Type : S-26PT1U6, S-36PT1U6, S-42PT1U6...
  • Page 226 3. Electrical data Ceiling Type : S-26PT1U6, S-36PT1U6, S-42PT1U6...
  • Page 227 3. Electrical data Low Silhouette Ducted Type : S-26PF1U6, S-36PF1U6...
  • Page 228 3. Electrical data Low Silhouette Ducted Type : S-26PF1U6, S-36PF1U6 3-10...
  • Page 229 3. Electrical data 4-Way Cassette 36”×36” Type : S-26PU2U6, S-36PU2U6, S-42PU2U6 3-11...
  • Page 230 3. Electrical data Wall Mounted Type : S-26PK2U6 3-12...
  • Page 231 3. Electrical data Ceiling Type : S-26PT2U6, S-36PT2U6, S-42PT2U6 3-13...
  • Page 232: Outdoor Units

    3. Electrical data 3-2. Outdoor Units U-26PE1U6 3-14...
  • Page 233 3. Electrical data U-26PE1U6 3-15...
  • Page 234 3. Electrical data U-26PS1U6 3-16...
  • Page 235 3. Electrical data U-26PS1U6 3-17...
  • Page 236 3. Electrical data U-36PE1U6 3-18...
  • Page 237 3. Electrical data U-36PE1U6 3-19...
  • Page 238 3. Electrical data U-36PS1U6 3-20...
  • Page 239 3. Electrical data U-36PS1U6 3-21...
  • Page 240 3. Electrical data U-42PE1U6 3-22...
  • Page 241 3. Electrical data U-42PE1U6 3-23...
  • Page 242 3. Electrical data U-42PS1U6 3-24...
  • Page 243 3. Electrical data U-42PS1U6 3-25...
  • Page 244 − MEMO − 3-26...
  • Page 245: Section 4: Service Procedures

    4. SERVICE PROCEDURES 4-1. Meaning of Alarm Messages..................4-2 4-2. Symptoms and Parts to Inspect ..................4-5 4-3. Details of Alarm Messages ..................4-8 4-4. Table of Thermistor Characteristics ................4-16...
  • Page 246: Service Procedures

    4. Service procedures 4-1. Meaning of Alarm Messages (1) Contents of remote controller switch alarm display Blinking: OFF: Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Serial commu- Remote controller is Error in receiving serial communication signal nication errors detecting error signal from (Signal from main indoor unit in case of group control)
  • Page 247 4. Service procedures Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Ceiling panel connection failure Indoor protection Activation of Fan protective thermostat protective Float switch device Alter. Faulty drain pump. Drain pump locked. DC fan error. Discharge temperature trouble Outdoor protection High pressure switch or compressor motor thermal protector is activated.
  • Page 248 4. Service procedures (2) LED Indicator Messages on Outdoor Control PCB LED 1 LED 2 Remarks Power ON sequence 1. No communication from indoor units in system If it is not possible to advance to 3, repeats 1 → 2. 2.
  • Page 249: Symptoms And Parts To Inspect

    4. Service procedures 4-2. Symptoms and Parts to Inspect Remote Alarm Judgment and controller Judgment condition Clear condition contents correction alarm display Stops when temp. exceeds Recovery at restart Abnormal discharge 1. Check refrigerant cycle temperature 232 ˚F. (gas leak). •...
  • Page 250 4. Service procedures Remote Alarm Judgment and correction controller Judgment condition Clear condition contents alarm display Current detection Inverter stops after alarm is Recovery at restart 1. Stops immediately when circuit trouble detected. Alarm is output restarted. • AC current value is when inverter stops (pre-trip) •...
  • Page 251 4. Service procedures Remote Alarm controller Judgment and correction Judgment condition Clear condition contents alarm display EEPROM trouble Reading/writing failure Recovery at power 1. Check EEPROM (IC007). reset 2. Check outdoor unit control PCB. Mismatch of indoor Indoor unit judges that type Recovery at power 1.
  • Page 252: Details Of Alarm Messages

    4. Service procedures 4-3. Details of Alarm Messages [Alarm “P29”] Input power detection circuit trouble (MDC trouble) Compressor does not run. Breakdown Motor current detection circuit trouble Is power OK? Correct power line. current Check and correct detection wiring. circuit wiring wiring and Check and correct connector...
  • Page 253 4. Service procedures (2) [Alarm “P26”] IGBT short-circuit protection on inverter control (IPDU) PCB HIC PCB trouble) Is power OK? Correct power line. circuit wiring, connector Correct. connections, and reactor connections Has filter PCB RY001 or RY002 relay activated? Has filter PCB Replace filter PCB.
  • Page 254 4. Service procedures HIC-CH4872R HIC-CH2672R (Type 42) (Type 26, 36) Resistance Between terminals Resistance 200 kΩ or more HIC + HIC – 300 kΩ or more HIC + 300 kΩ or more HIC + HIC + 300 kΩ or more 200 kΩ...
  • Page 255 4. Service procedures (4) [Alarm "P22"] Outdoor unit fan motor drive circuit trouble Are connectors CN003 and CN004 connected Correct the connector correctly to the outdoor unit control PCB? connections. Disconnect connectors CN003 and CN004 from outdoor unit control PCB, and rotate fan by hand.
  • Page 256 4. Service procedures (5) [Alarms “F04,” “F06,” “F07,” “F08,” “F12”] Sensor trouble Are connectors CN020, 021, 022, 023, and 024 (TD, TO, C1, C2, and Correct the connector TS sensors) connected connections. correctly to the outdoor unit control PCB? Are the TD, TO, C1, Replace the TD, TO, C1, C2, and TS sensor resistance* C2, or TS sensor.
  • Page 257 4. Service procedures n Sensor Temperature Display Function (displayed regardless of whether unit is operating or stopped) The procedure below displays the sensor temperatures from the remote controller, indoor unit, and outdoor unit on the remote controller. <Procedure of CZ-RTC2> Press and hold the buttons simultaneously for 4 seconds or longer.
  • Page 258 4. Service procedures <Procedure of CZ-RTC3 / CZ-RTC5> Keep pressing the buttons simultaneously for 4 or more seconds. The “Maintenance func” screen appears on the LCD display. Sensor info. 20:30 (THU) Unit no. Code no. Data Maintenance func 20:30 (THU) 0026 1.
  • Page 259 4. Service procedures <Procedure of CZ-RTC4> Sensor Temperature Display Function (Displayed both when operating and stopped) Press and hold the buttons The below check procedure can be used to display simultaneously for 4 seconds or longer. all remote controller, indoor unit, and outdoor unit The unit No.
  • Page 260: Table Of Thermistor Characteristics

    4. Service procedures Check Pin Short-circuit the cooling check pin (or heating check pin) on the outdoor unit control PCB to perform the control described below. 1. Thermistor checks The checks listed below are performed for 1 second each, in order from the top down. The results are displayed by LED 1 and 2.
  • Page 261: Section 5: Outdoor Unit Maintenance Remote Control

    5. OUTDOOR UNIT MAINTENANCE REMOTE CONTROL In the case of CZ-RTC2 5-1. Overview ........................5-2 5-2. Functions ........................5-2 5-3. Normal Display Operations and Functions ............... 5-3 5-4. Monitoring Operations: Display of Indoor Unit and Outdoor Unit Sensor Temperatures ......................5-6 5-5.
  • Page 262: In The Case Of Cz-rtc2 5-1. Overview

    5. Outdoor unit maintenance remote control In the case of CZ-RTC2 5-1. Overview What is the outdoor unit maintenance remote controller? Beginning with the DC-INV series of outdoor units, nonvolatile memory (EEPROM) is used in the outdoor unit PCB. In this way, the setting switches that were located on earlier PCBs have been converted to EEPROM data.
  • Page 263: Normal Display Operations And Functions

    5. Outdoor unit maintenance remote control 5-3. Normal Display Operations and Functions Normal display functions • Connect the special service checker wiring to the outdoor unit PCB. The connection is shown in the figure below. RC (3P, blue) Outdoor PCB connector unit PCB (3P, blue) Special service checker wiring...
  • Page 264 5. Outdoor unit maintenance remote control Display (functions) • Use the temperature setting buttons to change the item code. Item code Display contents 00 (1) Blinking 8-alarm code display at pre-trip, LED (2) No. of indoor units connected in that refrigerant system Unit.
  • Page 265 5. Outdoor unit maintenance remote control *2: 7-segment, 4-digit display for remote controller timer display The connected unit Nos. are displayed as shown below, using the 7-segment 4-digit ( ) display and the colon. Display for unit Nos. 1 – 20 Not lit Not lit Not lit...
  • Page 266: Monitoring Operations: Display Of Indoor Unit And Outdoor Unit Sensor Temperatures

    5. Outdoor unit maintenance remote control 5-4. Monitoring Operations: Display of Indoor Unit and Outdoor Unit Sensor Temperatures <Operating procedure> (1) Press and hold the button and button simultaneously for 4 seconds or longer to switch to temperature monitor mode. During temperature monitoring, “Service Monitor”...
  • Page 267: Monitoring The Outdoor Unit Alarm History: Display Of Outdoor Unit Alarm History

    5. Outdoor unit maintenance remote control 5-5. Monitoring the Outdoor Unit Alarm History: Display of Outdoor Unit Alarm History * Displays outdoor unit alarms only. Does not display indoor unit alarms. * Check the indoor unit alarm histories separately using the indoor unit remote controllers or other control device.
  • Page 268 5. Outdoor unit maintenance remote control List of Item Codes Control system schedule Do not set Control system schedule Do not set Do not set Control system schedule Snowfall sensor operation 0 = No sensor, control performed 1 = No sensor, control not performed 2 = Sensor present, control performed 3 = Sensor present, control not performed Outdoor fan quiet mode...
  • Page 269 5. Outdoor unit maintenance remote control Setting mode 2 <Operating procedure> (1) Press and hold the button, button, and button simultaneously for 4 seconds or longer. (2) Use the temperature setting buttons to change the item code. The item codes and setting data are shown in the table below. (3) Use the timer time buttons to change the setting data.
  • Page 270 5. Outdoor unit maintenance remote control List of Item Codes Refrigerant type 407 = R407C 22 = R22 410 = R410A Outdoor unit capacity* 0 = Disabled 80 : Type 26 112 : Type 36 140 : Type 42 Control system schedule Do not set Control system schedule Do not set...
  • Page 271: In The Case Of Cz-rtc4

    5. Outdoor unit maintenance remote control In the case of CZ-RTC4 5-7. Overview [Service Checker Section] n About the outdoor unit maintenance remote controller The outdoor unit utilizes nonvolatile memory (EEPROM) on its PCB. This allows EEPROM data to replace the setting switches that were present on previous PCBs.
  • Page 272: Functions

    5. Outdoor unit maintenance remote control 5-8. Functions n Functions on the ordinary display (1) Functions: Button operations can be used to perform the following functions. • Start/stop of all indoor units • Switching between cooling and heating • Test run of all indoor units •...
  • Page 273: Normal Display Operations And Functions

    5. Outdoor unit maintenance remote control 5-9. Normal Display Operations and Functions n Functions on the ordinary display Connect the special service checker wiring to the outdoor unit PCB. • The connection is shown in the figure below. When connecting the special service Outdoor unit PCB checker wiring to the remote controller (3P, BLU)
  • Page 274 5. Outdoor unit maintenance remote control All units start/stop (Fig. 3) <Operation> (Start/Stop operation) button can be used to start and stop all the indoor units. • The LED illuminates if any indoor units is operating. • The LED blinks if an alarm at any of the operating indoor units occurs.
  • Page 275 5. Outdoor unit maintenance remote control Display (functions) • Use the temperature setting buttons to change the item code. À Item code Á Item Blinking 8-alarm code display at pre-trip, LED No. of indoor units connected in that refrigerant system Unit.
  • Page 276 5. Outdoor unit maintenance remote control XX-YY R.C. Â Locations where À Á Â are displayed as Displays the outdoor unit sub-bus address which is shown in Fig. 6. currently selected. À Á XX = Outdoor system address on main bus line (1 – 30) YY = Outdoor unit sub-bus address (1 –...
  • Page 277 5. Outdoor unit maintenance remote control n Concerning the 7-segment, 4-digit display remote controller timer display The unit Nos. of connected units are indicated by four 7-segment digits ( ) and a colon. Display of unit Nos. 1 − 20 Meaning of display colon 1 ~ 20 21 ~ 40 41 ~ 60 61 ~ 80...
  • Page 278: Monitoring Operations: Display Of Indoor Unit And Outdoor Unit Sensor Temperatures

    5. Outdoor unit maintenance remote control 5-10. Monitoring Operations: Display of Indoor Unit and Outdoor Unit Sensor Temperatures <Operating procedure> À Press and hold the (Check) button and buttons simultaneously for 4 seconds or longer to engage temperature monitor mode. During temperature monitoring, is illuminates.
  • Page 279 5. Outdoor unit maintenance remote control Display of unit No. 1 (main unit) Indoor unit data Indoor unit intake temp. Indoor unit heat exchanger temp. (E1) Indoor unit heat exchanger temp. (E2) – Indoor unit discharge temp. – – Outdoor unit data Discharge temp.
  • Page 280: Alarm History

    5. Outdoor unit maintenance remote control 5-11. Mounting the Outdoor Unit Alarm History : Display of Outdoor Unit Alarm History • Displays outdoor unit alarms only. Check the indoor unit alarm histories separately using the • indoor unit remote controllers or other control device. <Operating procedure>...
  • Page 281: Setting Modes: Setting The Outdoor Unit Eeprom

    2WAY SYSTEM 6. Mode Settings Outdoor Unit Maintenance Remote Controller 5. Outdoor unit maintenance remote control 5-12. Setting Modes : Setting the Outdoor Display of fi rst 3 digits Unit EEPROM Setting mode 1 <Operating procedure> Press and hold the (Check) button and À...
  • Page 282 5. Outdoor unit maintenance remote control List of Item Codes Control system schedule Do not set Control system schedule Do not set Do not set Control system schedule Snowfall sensor operation 0 = No sensor, control performed 1 = No sensor, control not performed 2 = Sensor present, control performed 3 = Sensor present, control not performed Outdoor fan quiet mode...
  • Page 283 Â Ä À 5. Outdoor unit maintenance remote control A and are displayed alternately. (Example shows display of 000 410.) List of Item Codes (continued) Refrigerant type 407 = R407C 22 = R22 410 = R410A Outdoor unit capacity* 0 = Disabled 80 : Type 26 112 : Type 36 140 : Type 42...
  • Page 284 − MEMO − 5-24...
  • Page 285: Section 6: Test Run

    6. TEST RUN 6-1. Preparing for Test Run ....................6-2. Caution ........................6-3. Test Run Procedure ....................6-4. Items to Check Before the Test Run ................. 6-5. Test Run Using the Remote Controller ..............6-6. Precautions ....................... 6-7. Table of Self-Diagnostic Functions and Corrections (Type F2, U2, T2, K2, U1, K1, T1 and F1) ..............
  • Page 286: Preparing For Test Run

    6. Test run 6. TEST RUN 6-1. Preparing for Test Run Before attempting to start the air conditioner, check the following: (1) All loose matter is removed from the cabinet espe- cially steel filings, bits of wire, and clips. (Power must be turned ON (2) The control wiring is correctly connected and all at least 5 hours before electrical connections are tight.
  • Page 287: Caution

    6. Test run Type F2, U2, T2, K2, U1, K1, T1 and F1 6-2. Caution This unit may be used in a single-type refrigerant system where 1 outdoor unit is connected to 1 indoor unit. The indoor and outdoor unit control PCBs utilize a semiconductor memory element (EEPROM). The settings required for operation were made at the time of shipment.
  • Page 288: Items To Check Before The Test Run

    6. Test run 6-4. Items to Check Before the Test Run Turn the breaker ON at least 12 hours in advance in order to energize the crankcase heater. Fully open the closed valves on the liquid tube and gas tube sides. 6-5.
  • Page 289: Precautions

    6. Test run <Procedure of CZ-RTC4> Operates the unit with the thermostat forced ON. 1 Press and hold the button for 4 seconds or longer. 2 “ ” appears on the remote controller LCD ° ° display (Fig. 6-4). 3 Press the button to start the test run.
  • Page 290 6. Test run...
  • Page 291: Examples Of Wiring Diagrams

    6. Test run 6-8. Examples of Wiring Diagrams Basic wiring diagram 1 Single-type system Be careful to avoid miswiring when connecting the wires. (Miswiring will damage the units.) System address rotary switch (Set to “0” at the time of shipment.) Outdoor unit Ground Power supply...
  • Page 292 6. Test run Basic wiring diagram 2 Group control (when a central control device is not used) Simultaneous-operation multi system A maximum of 8 indoor units can be connected to 1 remote controller. Set the system address (refrigerant tubing system address) before turning on the remote power switch. (Refer to “Setting the system addresses”...
  • Page 293 6. Test run Setting the outdoor unit system addresses For basic wiring diagram 2 (Set the system addresses: 1, 2, 3...) Outdoor unit control PCB 3 – 5HP System address rotary switch (Set to “0” at time of shipment) System address rotary switch System address rotary switch System address 10s digit and 20s digit DIP switch...
  • Page 294 6. Test run <Procedure of CZ-RTC3 / CZ-RTC5> 1. Keep pressing the buttons simultaneously for 4 or more seconds. 20:30 (THU) The “Maintenance func” screen appears on the LCD display. 2. Press the button to see each Maintenance func 20:30 (THU) menu.
  • Page 295 6. Test run Indicating (marking) the indoor and outdoor unit combination number Indicate (mark) the number after automatic address setting is completed. (1) So that the combination of each indoor unit can be easily checked when multiple units are installed, ensure that the indoor and outdoor unit numbers correspond to the system address number on the outdoor unit control PCB, and use a magic marker or similar means which cannot be easily erased to indicate the numbers in an easily visible location on the indoor units (near the indoor unit nameplates).
  • Page 296 6. Test run <Procedure of CZ-RTC3 / CZ-RTC5> 1 Keep pressing the buttons simultaneously Maintenance func 20:30 (THU) 1. Outdoor unit error data for 4 or more seconds. 2. Service contact The “Maintenance func” screen appears on the LCD display. 3.
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