Page 1 Manual No.'21・KX-T-380 TECHNICAL MANUAL VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS (OUTDOOR UNIT) KXZ series (Heat pump type) Standard series • Single use (Used also for combination) FDC280KXZA2, 335KXZA2, 400KXZA2, 450KXZA2,475KXZA2,500KXZA2,560KXZA2 • Combination use FDC615KXZA2, 670KXZA2, 735KXZA2, 800KXZA2,850KXZA2,900KXZA2,950KXZA2,1000KXZA2, 1060KXZA2,1120KXZA2,1200KXZA2,1250KXZA2,1300KXZA2,1350KXZA2,1425KXZA2, 1450KXZA2, 1500KXZA2, 1560KXZA2,1620KXZA2,1680KXZA2 •...
Page 2 '21 • KX-T-380 PREFACE Combination table for KX series ( ) Date of launching in the market Indoor unit Connectable Same or Same series Same series Same series Mixed series Mixed series Mixed series Mixed series Same series remote control Mixed series RC-E1 KXE4(A)
Page 3 '21 • KX-T-380 CONTENTS 1. GENERAL INFORMATION ................1 1.1 Specific features ..................1 1.2 How to read the model name ..............2 1.3 Table of models ..................2 1.4 Outdoor units combination table ............. 3 2. OUTDOOR UNIT .................... 4 2.1 Specifications ..................
Page 4 '21 • KX-T-380 1. GENERAL INFORMATION 1.1 Specific features Connectable indoor capacity Capacity from 50% to 200% is possible. Item Number of connectable units Connectable capacity Model FDC(S)280(C)KXZA2 － FDC(S)335(C)KXZA2 － FDC(S)400(C)KXZA2 － FDC(S)450(C)KXZA2 － FDC(S)475(C)KXZA2 － FDC(S)500(C)KXZA2 － FDC(S)560(C)KXZA2 －...
Page 5 Example: FDC S 735 C KXZ A Series No. Application power source...See the specifications Multi KXZ series Cooling only type (Nothing:Heat pump type) Nominal capacity (nominal cooling capacity : 73.5kW) Corrosion protection treatment models (Nothing : Standard models) Model name (Outdoor unit)
Page 6 '21 • KX-T-380 1.4 Outdoor units combination table Item Combination Outdoor unit models Indoor unit Connectable Number of FDC(S)280 FDC(S)335 FDC(S)400 FDC(S)450 FDC(S)475 FDC(S)500 FDC(S)560 Models capacity connectable units (C)KXZA2 (C)KXZA2 (C)KXZA2 (C)KXZA2 (C)KXZA2 (C)KXZA2 (C)KXZA2 FDC(S)615(C)KXZA2 2 to 53 units FDC(S)670(C)KXZA2 2 to 58 units FDC(S)735(C)KXZA2...
Page 7 '21 • KX-T-380 2. OUTDOOR UNIT 2.1 Specifications Heat pump type • Single use (Used also for combination) PCB004Z537...
Page 8 '21 • KX-T-380 • Combination use PCB004Z537...
Page 9 '21 • KX-T-380 • Combination use PCB004Z537...
Page 10 '21 • KX-T-380 • High-COP combination use PCB004Z537...
Page 11 '21 • KX-T-380 Cooling only type • Single use (Used also for combination) PCB004Z538...
Page 12 '21 • KX-T-380 • Combination use PCB004Z538...
Page 13 '21 • KX-T-380 • Combination use PCB004Z538...
Page 14 '21 • KX-T-380 • High-COP combination use PCB004Z538...
Page 15 '21 • KX-T-380 2.2 Exterior dimensions Models FDC(S)280, 335(C)KXZA2 PCB004Z522...
Page 16 '21 • KX-T-380 Models FDC(S)400, 450, 475, 500, 560(C)KXZA2 PCB004Z523...
Page 17 '21 • KX-T-380 2.3 Electrical wiring Models FDC(S)280, 335(C)KXZA2 PCB004Z540...
Page 18 '21 • KX-T-380 Models FDC(S)400, 450(C)KXZA2 PCB004Z541...
Page 19 '21 • KX-T-380 Models FDC(S)475, 500, 560(C)KXZA2 PCB004Z542...
Page 20 '21 • KX-T-380 2.4 Noise level Measured based on JIS B 8616 Mike position as highest noise level in position as below Distance from front side 1m Height Model FDC(S)280(C)KXZA2 Model FDC(S)335(C)KXZA2 Model FDC(S)400(C)KXZA2 Noise level 56 dB (A) at cooling Noise level 63 dB (A) at cooling Noise level 60 dB (A) at cooling 57 dB (A) at heating...
Page 21 '21 • KX-T-380 3. RANGE OF USAGE & LIMITATIONS • Single use (also for combined use) System FDC(S)280(C)KXZA2 FDC(S)335(C)KXZA2 FDC(S)400(C)KXZA2 Item Indoor air temperature (Upper, lower limits) Refer to page 23. Outdoor air temperature (Upper, lower limits) Indoor units 1 to 24 units Number of connected units 1 to 29 units 1 to 34 units...
Page 22 '14 • KX-DB-201 '21 • KX-T-380 Allowable length of refrigerant piping, height difference between indoor and outdoor unit (1) Branch pipe system (Branch piping used) Outdoor unit Indoor unit denotes Max. 90m Max. 40m (Highest indoor unit) Ⅰ Ⅱ Max. 130m Ⅲ...
Page 23 '21 • KX-T-380 • Combination use System FDC(S)615(C)KXZA2 FDC(S)670(C)KXZA2 FDC(S)735(C)KXZA2 FDC(S)800(C)KXZA2 FDC(S)850(C)KXZA2 Item Indoor air temperature (Upper, lower limits) Refer to page 23. Outdoor air temperature (Upper, lower limits) Indoor units Number of connected units 2 to 53 units 2 to 58 units 2 to 63 units 2 to 69 units 2 to 73 units...
Page 24 '21 • KX-T-380 System FDC(S)1200(C)KXZA2 FDC(S)1250(C)KXZA2 FDC(S)1300(C)KXZA2 FDC(S)1350(C)KXZA2 FDC(S)1425(C)KXZA2 Item Indoor air temperature (Upper, lower limits) Refer to page 23. Outdoor air temperature (Upper, lower limits) Indoor units 3 to 80 units 3 to 80 units 3 to 80 units 3 to 80 units 3 to 80 units Number of connected units...
Page 25 '21 • KX-T-380 Allowable length of refrigerant piping, height difference between indoor and outdoor unit (1) Branch pipe system (Branch piping used) Outdoor unit Indoor unit denotes Oil equalization piping Outdoor Max. 90m unit 1 Max. 130m Max. 40m Max. 5m (Highest indoor unit) Outdoor unit 2...
Page 26 '21 • KX-T-380 Operating temperature range 46℃DB Cooling operation 43℃DB -15℃DB Indoor air WB temperature °CWB In case it is the promised installation location that the outdoor unit is used on conditions with the ambient temperature of 43 ℃ or more, refer to pages 12 and 13 (2.2 Exterior dimensions). Heating operation Outdoor air WB temperature °CWB “CAUTION”...
Page 27 '21 • KX-T-380 Speciﬁcation for installation with large head difference (Applicable to: FDC(S)280 - 1680(C)KXZA2) In case when the outdoor unit is installed at a higher place and the difference in the elevation between the indoor and the outdoor units is larger than 50m and smaller than 90m, the limitation on application differs partially from ordinary applications and, instead, the following speciﬁcation applies.
Page 28 '21 • KX-T-380 '21 • KX-T-378 <Pipe size selection> In the figure for pipe selection, sizes of main pipe and the pipe between the branch at the indoor side and the indoor unit are selected on the basis different from normal practice. (1) Main pipe (branch of the outdoor unit –...
Page 29 '21 • KX-T-380 Speciﬁcation for installation with large head difference between indoor units (Applicable to: FDC(S)280 - 1680(C)KXZA2) In case of the difference in the elevation between the indoor unit in a system is larger than 18m and smaller than 30m, the limitation on application differs partially from ordinary applications and, instead, the following speciﬁcation applies.
Page 30 '21 • KX-T-380 <Pipe size selection> In the figure for pipe selection, sizes of the pipe between the first branch and the branch at the indoor side, and the pipe between the branch at the indoor side and the indoor unit are selected on the basis different from normal practice. (1) The pipe between the first branch and the branch at the indoor side Size of gas pipe is different that includes the lower indoor unit more than 18m downstream.
Page 31 '21 • KX-T-380 4. PIPING SYSTEM Models FDC(S)280, 335(C)KXZA2 PCB004Z524...
Page 32 '21 • KX-T-380 Models FDC(S)400, 450(C)KXZA2 PCB004Z525...
Page 33 '21 • KX-T-380 Models FDC(S)475, 500, 560(C)KXZA2 PCB004Z526...
Page 34 '21 • KX-T-380 5. SELECTION CHART (1) Equipment selection ﬂow Calculate the load for each room separately, then determine the indoor load. Select an indoor unit that matches the indoor load (tentative). Calculate the temperature compensation, then calculate the indoor unit capacity. Change the indoor unit.
Page 35 '21 • KX-T-380 Correction of heating capacity in relation to the frost on the outdoor unit heat exchanger compensation coefficient according to indoor unit connection capacity Correction of cooling capacity in relation to the anti-frost on the indoor unit heat exchanger See item (3) (a) concerning the capacity compensation coefﬁcient according to temperature conditions.
Page 36 '21 • KX-T-380 <System cooling capacity>: Item (2) (c) calculation Compare the indoor unit total cooling capacity and the outdoor unit maximum cooling capacity. The smaller value is the actual system cooling capacity. • Indoor unit total cooling capacity: 39.9 kW System cooling capacity: 39.9 kW •...
Page 37 '21 • KX-T-380 <Outdoor unit maximum heating capacity> : Item (2) (b) calculation • Outdoor unit rated heating capacity: 50.0 kW • Capacity compensation coefﬁcient according to temperature conditions: 1.04 (Calculated according to Outdoor 6˚C WB / Indoor 19˚C DB); (See page 35.) Outdoor unit heating capacity: 50.0 kW 1.04 = 52.0 kW •...
Page 38 '21 • KX-T-380 Heating ◆ 1.20 1.15 Outdoor air WB temperature 18˚CWB 1.10 Outdoor air WB temperature 10˚CWB 1.05 Outdoor air WB temperature 14˚CWB 1.00 Outdoor air WB temperature 6˚CWB 0.95 Outdoor air WB temperature 2˚CWB 0.90 Outdoor air WB temperature -2˚CWB 0.85 Outdoor air WB temperature -6˚CWB 0.80...
Page 39 '21 • KX-T-380 Heating ◆ 1.25 Outdoor air WB temperature 6˚CWB Outdoor air WB temperature -2˚CWB 1.20 Outdoor air WB temperature 2˚CWB Outdoor air WB temperature -6˚CWB 1.15 1.10 Outdoor air WB temperature 10˚CWB 1.05 1.00 0.95 Outdoor air WB temperature -15˚CWB 0.90 0.85...
Page 40 '21 • KX-T-380 Model FDC(S)475(C)KXZA2 Model FDC(S)500(C)KXZA2 1.00 1.00 Gas pipe: φ 31.8 Gas pipe: φ 31.8 0.95 0.95 Gas pipe: φ 28.58 Gas pipe: φ 28.58 0.90 0.90 0.85 0.85 0.80 0.80 120 140 160 180 120 140 160 180 Refrigerant piping one way equivalent length (m) Refrigerant piping one way equivalent length (m) Model FDC(S)560(C)KXZA2...
Page 41 '21 • KX-T-380 Model FDC(S)900(C)KXZA2 Model FDC(S)950(C)KXZA2 (FDC(S)450(C)KXZA2 + FDC(S)450(C)KXZA2) (FDC(S)475(C)KXZA2-K+FDC(S)475(C)KXZA2) 1.00 1.00 Gas pipe: φ 38.1 Gas pipe: φ 38.1 Gas pipe: φ 34.92 0.95 0.95 Gas pipe: φ 31.8 Gas pipe: φ 31.8 0.90 0.90 0.85 0.85 Gas pipe: φ 34.92* 0.80 0.80 120 140 160 180...
Page 42 '21 • KX-T-380 Model FDC(S)1425(C)KXZA2 Model FDC(S)1350(C)KXZA2 (FDC(S)475(C)KXZA2+FDC(S)475(C)KXZA2+FDC(S)475(C)KXZA2) (FDC(S)450(C)KXZA2+FDC(S)450(C)KXZA2+FDC(S)450(C)KXZA2) 1.00 1.00 0.95 0.95 0.90 Gas pipe: φ 38.1 Gas pipe: φ 38.1 0.85 0.90 φ Gas pipe: 34.92 Gas pipe: φ 34.92 0.80 0.85 0.75 0.70 0.80 100 120 140 160 180 100 120 140 160 180 Refrigerant piping one way equivalent length (m) Refrigerant piping one way equivalent length (m)
Page 43 '21 • KX-T-380 Note (1) Equivalent piping length can be obtained by calculating as follows. Equivalent piping length = Real gas piping length + Number of bends in gas piping × Equivalent piping length of bends Equivalent length of each joint Unit : m/one part φ15.88 φ19.05...
Page 44 '21 • KX-T-380 Model FDC(S)335(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC(S)400(C)KXZA2 ◆...
Page 45 '21 • KX-T-380 Model FDC(S)450(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC(S)475(C)KXZA2 ◆...
Page 46 '21 • KX-T-380 Model FDC(S)500(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC(S)560(C)KXZA2 ◆...
Page 47 '21 • KX-T-380 Model FDC(S)615(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC(S)670(C)KXZA2 ◆...
Page 48 '21 • KX-T-380 Model FDC(S)735(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC(S)800(C)KXZA2 ◆...
Page 49 '21 • KX-T-380 Model FDC(S)850(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC(S)900(C)KXZA2 ◆...
Page 50 '21 • KX-T-380 Model FDC(S)950(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC(S)1000(C)KXZA2 ◆...
Page 51 '21 • KX-T-380 Model FDC (S) 1060 (C) KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor units (%) Total capacity of concurrently operating indoor unit (%) Model FDC (S) 1120 (C) KXZA2 ◆...
Page 52 '21 • KX-T-380 Model FDC(S)1200(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC (S) 1250 (C) KXZA2 ◆...
Page 53 '21 • KX-T-380 Model FDC(S)1300(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC (S) 1350 (C) KXZA2 ◆...
Page 54 '21 • KX-T-380 Model FDC(S)1425(C)KXZA2 ◆ Capability compensation coefficient Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC (S) 1450 (C) KXZA2 ◆...
Page 55 '21 • KX-T-380 Model FDC(S)1500(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Cooling Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC (S) 1560 (C) KXZA2 ◆...
Page 56 '21 • KX-T-380 Model FDC(S)1620(C)KXZA2 ◆ Capability compensation coefficient Heating Cooling Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) ◆ Power consumption compensation coefficient Heating Total capacity of concurrently operating indoor unit (%) Total capacity of concurrently operating indoor unit (%) Model FDC(S)1680(C)KXZA2 ◆...
Page 57 '21 • KX-T-380 The capacity compensation coefficient: Cooling capacity in low temperature under operation of Anti-frost control ( i ) Indoor fan tap: P-Hi Total capacity of concurrently operating indoor unit : 20% Outdoor air DB temperature Total capacity of concurrently operating indoor unit : 40%, 50% Outdoor air DB temperature Total capacity of concurrently ...
Page 58 '21 • KX-T-380 ( ii ) Indoor fan tap: Lo Total capacity of concurrently operating indoor unit : 20%, 40%, 50% Outdoor air DB temperature (℃DB) Total capacity of concurrently operating indoor unit : 60%, 80% Outdoor air DB temperature (℃DB) Total capacity of concurrently ...
Page 59 '21 • KX-T-380 6. WARNINGS ON REFRIGERANT LEAKAGE 6. WARNINGS ON REFRIGERANT LEAKAGE Check of concentration limit Important he room in which the air-conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its concentration will not exceed a set limit.
Page 60 '16 • PAC-T-251 '21 • KX-T-380 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 7. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10.1 Remote control 7.1 Remote control (Option parts) Wired remote control (1) Wired remote control Model RC-EX3A (a) Model RC-EX3A ⑤...
Page 61 '16 • PAC-T-251 '21 • KX-T-380 (b) Model RC-E5 The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation. Characters displayed with dots in the liquid crystal display area are abbreviated.
Page 62 '16 • PAC-T-251 '21 • KX-T-380 (2) Wireless remote control Wireless remote control Model RCN-E2 Indication section ① OPERATION MODE display Indicates selected operation mode. SET TEMP display Indicates set temperature. SLEEP TIMER time display Indicates the amount of time remaining on the sleep timer. ②...
Page 63 '21 • KX-T-380 7.2 Operation control function by the wired remote control 1.10.2 Operation control function by the wired remote control (1) Model RC-EX3A (a) Switching sequence of the operation mode switches of remote control (i) Tap the change operation mode button on the TOP screen. (ii) When the change operation mode screen is displayed, tap the button of desired mode.
Page 64 '21 • KX-T-380 ●Content memorized with the power failure compensation are as follows. Note(1) Items f) and g) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled regardless whether the power failure compensation is effective or not. At power failure –...
Page 65 '21 • KX-T-380 (2) Model RC-E5 (a) Switching sequence of the operation mode switches of remote control COOL HEAT AUTO (b) CPU reset This functions when “CHECK” and “ESP” buttons on the remote control are pressed simultaneously. Operation is same as that of the power source reset.
Page 66 '21 • KX-T-380 (3) Operation and setting from wired remote control A : Refer to the instruction manual for RC-EX series ○：Nearly same function setting and operations are possible. B : Refer to the installation manual for RC-EX series △：Similar function setting and operations are possible. C : Loading a utility software via Internet Setting ＆...
Page 67 '21 • KX-T-380 Setting ＆ display item Description RC-EX3A RC-E5 2 Administrator settings R/C display setting Register [Room name] [Name of I/U] Display [Indoor temp. display] or not. △ [Administrator password] Display [Error code display] or not. Display [Heating stand-by display] [Defrost operation display] [Auto cooling/heating display] [Display temp. of R/C, Room, Outdoor] or not The administrator password can be changed.
Page 68 '21 • KX-T-380 7.3 Operation control function by the indoor control (1) Operations of functional items during cooling/heating Cooling Heating Operation Dehumidifying Thermostat Thermostat Thermostat Thermostat Hot start (Defrost) Functional item Compressor Í Í Í /Í (Í) 4-way valve Í Í...
Page 69 '21 • KX-T-380 (v) Set OFF timer by clock Set the time to stop operation. The time can be set in the unit of 5-minute. This setting can be switched only once or daily. Note (1) It is necessary to set the clock to use this timer. (vi) Weekly timer Set the ON or OFF timer for a week.
Page 70 '21 • KX-T-380 a) Thermostat OFF i) Operates according to the fan control setting at heating thermostat OFF. ii) Even if it changes from thermostat OFF to ON, the fan continues to operate with the fan control at thermostat OFF till the heat exchanger temperature sensor (Thi-R1 or R2, whichever higher) detects 35°C or higher. iii) When the heat exchanger temperature sensor (Thi-R1 or R2, whichever higher) detects 35°C or higher, the fan operates with the set air flow volume.
Page 71 '21 • KX-T-380 (iii) Louver free stop control If you touch the “Menu” → “Service setting” → “R/C function settings” → “Service password” buttons one after another on the TOP screen of remote control, the “Upper / lower flap control” screen is displayed. If the free stop is selected on this screen, the louver motor stops upon receipt of the stop signal from the remote control.
Page 72 '21 • KX-T-380 (c) Fan control during heating thermostat OFF (i) Following fan controls during the heating thermostat OFF can be selected with the indoor function setting of the wired remote control. ① Low fan speed (Factory default) ② Set fan speed ③ Intermittence ④ Fan OFF (ii) When the “Low fan speed (Factory default)”...
Page 73 '21 • KX-T-380 (8) Filter sign As the operation time (Total ON time of ON/OFF switch) accumulates to 180 hours , “FILTER CLEANING” is displayed on the remote control. (This is displayed when the unit is in trouble and under the central control, regardless of ON/OFF) Notes (1) Time setting for the filter sign can be made as shown below using the indoor function of wired remote control “Filter sign”.
Page 74 '21 • KX-T-380 (11) Drain pump abnormalities detection (a) Drain detection switch is turned ON or OFF with the float switch (FS) and the timer. Drain detection switch ON Normal state Normal state [*1] [*2] [ ＊ 1] Drain detection switch is turned “ON” when the float switch “Open” is detected for 3 seconds continuously in the drain detectable space.
Page 75 Item Temperature - Low (Factory default) Temperature - High '21 • KX-T-380 Note (1) Frost prevention temperature setting can be selected with the indoor unit function setting of the wired remote control. (15) Heating overload protection If the indoor heat exchanger temperature (detected with Thi-R) at 63°C or higher is detected for 2 seconds continuously, •...
Page 76 '21 • KX-T-380 '16 • PAC-T-251 '16 • PAC-T-251 (17) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection (a) Broken wire detection (17) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection If the return air temperature sensor detects broken wire for 5 seconds continuously, the compressor stops (E7). If the heat (a) Broken wire detection exchanger temperature sensor detects broken wire for 5 seconds continuously, the compressor stops (E6).
Page 77 '21 • KX-T-380 (b) Input for external control The external input for the indoor unit can be selected from the following input by the wired remote control. The input connectors (CnT-6 and CnTA) are equipped on the indoor unit control PCB. “LEVEL INPUT(Factory default)”...
Page 78 available*(1) *(1) In case that “Operation permission/prohibition mode” setting is “Valid” and “External input” setting is “Level input (Factory default)”; '21 • KX-T-380 ① When card key switch is ON (CnT-6 or CnTA ON: Operation permission), start/stop operation of the unit from the wired remote control becomes available.
Page 79 Actual operation Stop Stop Stop Stop '21 • KX-T-380 Remote control Remote Remote Remote control OFF control ON control ON Note (1) If it is prohibited by CnT, all “Operation” and “Stop” commands are not accepted. (f) In case of CnT ② Operation stop pulse + CnTA ③ Operation permission/prohibition level ③...
Page 80 '21 • KX-T-380 (c) If the cooling/heating selection signal is given by the external input, the operation mode is transmitted to the remote control. ■ Selection of cooling/heating external input function External input External input Operation selection method External input (CnT or CnTA) Cooling zone Heating zone...
Page 81 '21 • KX-T-380 (25) High power operation (RC-EX3A only) It operates at with the setting temperature fixed at 16°C for cooling, 30°C for heating and maximum indoor fan speed for 15 minutes maximum. (26) Energy-saving operation (RC-EX3A only) It operates with the setting temperature fixed at 28°C for cooling, 22°C for heating or 25°C for auto. When fan control in cooling/ heating thermo-OFF setting is “Set fan speed”, fan speed during thermo-OFF is changed to “Low”.
Page 82 In order to reach the room temperature to the set temperature as quickly as possible, the air flow rate is increased when the set temperature of thermostat differs largely from the return air temperature. According to temperature difference between set temperature and return air temperature, indoor fan tap are controlled automalically.
Page 83 Back Select the item. '21 • KX-T-380 RCN-E2 1. Set indoor functions ① Press the ON/OFF button to stop the unit. ② Press the desired one of the buttons shown item 2. while holding down the ① ② FUNCTION SETTING switch. ②...
Page 84 '21 • KX-T-380 7.4 Operation control function by the outdoor control (A) Normal control (1) Operation of major functional components under each operation mode Operation Cooling Heating mode Dehumidify Functional Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Defrost Components Remote control Remote control Remote control...
Page 85 '21 • KX-T-380 (2) Compressor control (Master unit/slave unit) (a) Starting compressor (i) Compressor starting order After turning the power on, firstly CM1 compressor starts. (In case of the combination use, it is CM01 of master unit) And corresponding to the condition of under-dome temperature and to the required capacity of indoor units thermostat ON, the next compressor will start sequentially, and finally maximum 6 compressors ( in case of 3 out- door units combination use) will start simultaneously.
Page 86 '21 • KX-T-380 5) 2 outdoor units combination use (Model 735) Model 400 (Master) + 335 (Slave) Master unit Slave unit CM01 CM11 (CM1) (CM1) Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially. System load range Local load range Master unit...
Page 87 '21 • KX-T-380 8) 3 outdoor units combination use (Model 850, 900, 950, 1000) Master unit Slave unit 1 Slave unit 2 CM01 CM11 CM21 (CM1) (CM1) (CM1) (Model 850, 900, 950, 1000) Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially. System load range Local load range Master unit...
Page 88 '21 • KX-T-380 Model 400(Master)+335(Slave1)+400(Slave2) Master unit Slave unit 1 Slave unit 2 CM01 CM11 CM21 (CM1) (CM1) (CM1) Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially. System load range Local load range Master unit CM01...
Page 89 '21 • KX-T-380 (ii) Rotation of compressor start/stop order 1) The compressors will be changed over by determinating the start/stop order in each heat load zone. 2) In case of single use, the starting order of CM1 and CM2 will be changed over on each occasion when the out- door unit stops.
Page 90 '21 • KX-T-380 (4) Defrost operation (Master unit/Slave unit) If the defrost operation starting conditions at the outdoor heat exchanger are satisfied, defrost operation starts. (a) Temperature conditions for defrost operation (i) Conditions for starting defrost operation When all of following conditions are satisfied, defrost operation will be started. 1) When the cumulative operation time of Fig.1 J15 opened...
Page 91 '21 • KX-T-380 (5) Protective control (a) High pressure protective control/error If the high pressure exceeds 3.7MPa, the compressor speed is reduced gradually. It reduces to 20rps at the lowest. If the high pressure still rises to 4.15MPa, the compressor stops. (b) Low pressure protective control/error If the low pressure drops below 0.18MPa, the compressor speed is reduced gradually.
Page 92 '21 • KX-T-380 (6) Auto backup operation (a) Classication of auto backup operations When the auto backup operation is enabled, anomaly stops are classifiedas follows and countermeasures are provided for respective categories. System stop: All stop including master/slave units Unit stop: Stop in the unit of outdoor unit Compressor stop: Stop in the unit of compressor (b) Control contents of auto backup operation (i) Condition of auto backup operation is satisfied when the DIP switch SW3-2 on the PCB of master unit is turned...
Page 93 '21 • KX-T-380 Anomalous stop of master outdoor unit Anomalous stop of slave outdoor unit Remote control Anomaly contents error display System stop Unit stop Compressor stop System stop Unit stop Compressor stop Duplicated outdoor unit address No. Open L1,L2,N Phase on power source at primary side Discharge pipe temperature sensor error Outdoor heat exchanger and subcooling coil temperature sensor anomaly...
Page 94 '21 • KX-T-380 (7) Test run (a) This control can be performed from the master unit, not from the slave unit. If this control is done from the slave unit, the following display is shown on the 7-segement display. The display returns to normal display if the test run control switch is reset. Code indicator Data indicator Contents of invalid operation...
Page 95 Items that are to be set by the customer Code Contents of a display Communication protocol　0: Previous SL mode (The communication plotocol is displayed ; display only) 　　　　　 1: New SL mode '21 • KX-T-380 Automatic address start Input starting address Specify a starting indoor unit address in automatic address setting.
Page 96 '21 • KX-T-380 '14 • KX-SM-202 3) The operation condition is displayed on the LCD of remote control and it is transferred to option central control. 4) When the operation command from remote control is not accepted by this control, "Center" is displayed on the LCD of remote control.
Page 97 '21 • KX-T-380 '14 • KX-SM-202 4) Demand control Demand ratio can be changed with the 7-segment "P04" on the outdoor control PCB. Compressor P04 setting output (%) 080(Factory default) This control has priority over the controls of 4-way valve safeguard, compressor protective start operation, defrost operation, oil equalized operation, oil return operation, pump-down operation for replacement, Start/Stop pump-down operation and check operation.
Page 98 '14 • KX-SM-202 '21 • KX-T-380 Valid(Open) Demand input Demand control Demand control (CnS1,S2,G1,G2) Normal Normal Invalid(Shorted) Valid(Open) Demand input 2 Demand control (CnS1,S2,G1,G2) Normal Normal Invalid(Shorted) PUSH PUSH PUSH PUSH Remote control operation Remote Remote control display 1st step 1st step 2nd step 3rd step 2nd step 1st step Air-conditioner operation/stop...
Page 99 '21 • KX-T-380 (2) Silent mode control (Note) With CnG2 terminal and 7-segment display [P10]-[3] for silent mode 1(Factory default) or with CnG2 terminal and 7-segment display [P10]-[8] for silent mode 2 (Setting on site) It is also avilable to use other terminals as follows. CnS2: [P08]-[3] or -[8] CnS1: [P07]-[3] or -[8] CnG1: [P09]-[3] or -[8]...
Page 100 '21 • KX-T-380 (3) Outdoor fan snow protection control (Master unit/Slave unit) (Note) Following explanation is based on setting function with 7-segment display [P02]. However the following terminals and 7-segment function settings are available to use. CnS1: [P07]-[5] CnS2: [P08]-[5] CnG1: [P09]-[5] CnG2: [P10]-[5] (a) The setting of this control should be done not only on the master unit but also on the slave unit, because the fans of master...
Page 101 '21 • KX-T-380 P01 setting Mode 0 (Factory default) First unit’s operation mode Last unit’s operation mode Priority of master unit’s setting operation mode Priority of required major operation mode ・ First unit’s operation mode: Operation mode of the indoor unit which is operated first time after stop of the outdoor unit operation mode ・...
Page 102 '21 • KX-T-380 ③ When it is changed from same mode to unmatch Indoor unit 0 Stop Cooling Heating “Invalid operation” lamp flickers. Indoor unit 1 Stop Cooling Cooling ④ Operation mode is prepared for change in the fan mode. Indoor unit 0 Stop Indoor unit 1...
Page 103 '21 • KX-T-380 (d) Forced cooling /heating operation (Master unit) (Note) Following explanation is based on using CnG1 terminal and setting function [P09]-[2] with 7-segment display. However other terminals can be used with following function setting of 7-segment display. CnS1: [P07]-[2] CnS2: [P08]-[2] CnG2: [P10]-[2] 1) When SW3-7 on the outdoor control PCB is turned ON after setting function [P09]-[2] with 7-segment display, if CnG1...
Page 104 '21 • KX-T-380 (6) Operation and error signal output (Master unit/Slave unit) This is the function to retrieve and display the operation and error information on the outdoor unit as a batch.. Although indoor units also have the function to retrieve the operation and error information, this function is designed to retrieve the whole information of each refrigeration system connected to the outdoor unit.
Page 105 '21 • KX-T-380 2: Compressor ON output ·It is turned ON, when the compressor is ON 3: Fan ON output ·It is turned ON, when the outdoor fan No.1 speed command > 0, or the outdoor fan No.2 speed command > 0. 4: Oil return operation output ·It is turned ON at oil return operation in cooling or at oil return operation in heating, or at defrost operation in heating.
Page 106 '21 • KX-T-380 (9) Pump-down operation by external input If an error stop is raised by an external input by refrigerant leaking alarm unit, the pump-down operation is performed at the out- door unit side in order to prevent the refrigerant from leaking. They are local arrangements.
Page 107 '21 • KX-T-380 ●Sample of system configuration Alarm unit Reserve Valve to shut gas pipe Valve to shut liquid pipe PCB2-1 CNR2,CNR3 PCB2-1 SV11 CNR2,CNR3 SV11 CNM1 WH CNN6 BK CNN1 RD CNR1 WH CNN9 BK CNN2 YE CNZ WH CNW BK PCB3-1 Reserve...
Page 108 '21 • KX-T-380 (10) Continuous Heating Capacity Control (CHCC) (a) Starting condition 1) Defrost operation interval extension control (See page 87.) ① When 7-segment [P00] is set at 1. ② When the defrost operation start conditions 1) – 3) are satisfied. ③...
Page 109 '21 • KX-T-380 (11) VTCC : Variable Temperature and capacity control (VRF inverter multi-system energy save control) On the multi-system, target pressures are set uniformly so that indoor units operate with a constant capacity and repeat the ON/ OFF control with which thermostats are turned OFF when temperatures become near the setting temperature. Owing to the tuning of target high/low pressure near the setting temperature, it becomes possible to perform the high efficiency operation near the setting temperature.
Page 110 '21 • KX-T-380 (b) Compressor upper limit speed restriction for each operation capacity (i) Starting condition (either of ① or ② ) ① When the external input assignment [P07] – [P10]: Multi-system energy save operation = Valid and 7-segment [P16] (Multi-system energy save control II) = 1 or 2 or 3 Factory default: 0 (OFF)/1 (Setting 1), 2 (Setting 2), 3 (Setting 3) ②...
Page 111 '21 • KX-T-380 (C) Data output (1) 7-segment display and operation data retention (a) 7-segment display Operation information is displayed for checking various operation data during test run and for helping malfunction diagno- sis at servicing. Input data to microcomputer, contents of outdoor unit control, registration information of indoor units and etc.
Page 112 '21 • KX-T-380 (iii) Error code displayed at error occurrence can be reset with the DIP switch SW3-1 ON. (iv) Discharge pressure saturated temperature and suction pressure saturated temperature are displayed after rounding to unit, if it is -10.0°C or lower. (Because the 7-segment display range is 3-digit) (v) Priority of display 1) [EXX] >...
Page 113 '21 • KX-T-380 (b) 7-Segment display Code Data display Minimum Contents of display Remark range unit Unusual code Pump down PoE, PoS Ð − − Check mode CH?, PCL? Outdoor unit setup, piping cleaning oPE?? CM1 operating frequency 0–130 1rps CM2 operating frequency 0–130 1rps...
Page 114 '21 • KX-T-380 Code Data display Minimum Contents of display Remark range unit CNS1 Order of 100 : CNS1 CNS2 Order of 10 : CNS2 − CNG1 Order of 1 : CNG1 (0: Open, 1: Close) CNG2 Order of 100 : CNG1 Order of 10 : SV8 −...
Page 115: Table Of Contents
'21 • KX-T-380 Code Data display Minimum Contents of display Remark range unit FMo1 operating revolution command 0–999 10min FMo2 operating revolution command 10min 0–999 0–100 Only displaying Demand ratio 0–127 Outdoor operating mode pattern Control status 0–127 0–127 See table on page114. Protection control status Compressor stop causes 0–127...
Page 116 '21 • KX-T-380 Code Data display Minimum Contents of display Remark range unit 0–80 Auto back up capable time Program sub-version 0–991 — Program POL version 0.00–9.99 0.01 — Auto send display — 0: (Factory default) — Continuous Heating Capacity Coutrol (CHCC) 0, 1, 2 0: (Factory default) Switching to operation priority...
Page 117: C67 Protection Control Status
'21 • KX-T-380 Code Data display Minimum Contents of display Remark range unit Auto address setting on Indoor unit address No. assignment normal ending Indoor unit address No. assignment error 1 Indoor unit address No. assignment error 2 Indoor unit address No. assignment error 3 Superlink setting error <7-segment software input>...
Page 118: C68 Compressor Stop Causes
'21 • KX-T-380 '21 • KX-T-378 [C68] Compressor stop causes <Deﬁnition of signal> Shows the latest compressor stop cause counted from right now. (Excluding the ordinary stop, etc.) Output of the No. is retained till next compressor stop cause occurs. Compressor stop causes Number No history...
Page 119 '21 • KX-T-380 (c) Saving of Operation Data For the purpose to investigate the cause of trouble in the ﬁeld, the operation data are always saved in the memory, and if the trouble occurs, the data writing is stopped and the operation data prior to the trouble occurrence are recorded. These data can be retrieved to personal computer through 4 pin connector on the outdoor control PCB and utilized for probing the cause.
Page 120 '21 • KX-T-380 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes Heating operation 1-speed Heating operation 2-speed Heating operation 3-speed Heating operation 4-speed Heating operation 5-speed Heating operation 6-speed Indoor unit 1 Demand frequency 0–255 1 rps Indoor unit 1 Answer frequency...
Page 121 '21 • KX-T-380 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes Heat dissipation fin 2 - 20–140 A/D value Tho-S Suction pipe temperature -40–75 A/D value Tho-SC Subcooling coil temperature 1 -40–75 A/D value Liquid pipe side Tho-H Subcooling coil temperature 2 -40–75...
Page 122 '21 • KX-T-380 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes Cooling operation subcooling 0–25.5 A/D value Superheat of suction pipe 0–25.5 A/D value 0–25.5 Superheat of subcooling coil A/D value Under-dome superheat CM1 0–25.5 0.1ºC Under-dome superheat CM2...
Page 123 '21 • KX-T-380 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes Bit5 0: OFF, 1: ON Bit6 SV10 0: OFF, 1: ON Bit7 SV11 0: OFF, 1: ON Bit0 SV12 0: OFF, 1: ON —...
Page 124 '21 • KX-T-380 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes 0: Normal In low outdoor temperature Bit0 — — Control status 2 1: Practice control 0: Normal In for replacement pump-down Bit1 1: Practice control 0: Normal Bit2...
Page 125: Protection Control Causes
'21 • KX-T-380 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes Td protection 2-1 0: Normal Bit0 Protection control status 2 — — EEVSC-Td cooling control 1: Practice Td protection 2-2 0: Normal Bit1 EEVH-Td cooling control 1: Practice Td protection 4...
Page 126: Compressor Error Causes
'21 • KX-T-380 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes Counter ･ Anomalous compressor by loss of 0–255 — synchronism (CM1) Counter ･ Anomalous compressor by loss of 0–255 — synchronism (CM2) Counter ･ Communication error between inverter 0–255 —...
Page 127 '21 • KX-T-380 Record data Code Write-in content Data write-in Number of Write-in unit Content range bytes Bit4 SW4-5 0: OFF 1: ON Bit5 SW4-6 0: OFF 1: ON Bit6 SW4-7 0: OFF 1: ON Bit7 SW4-8 0: OFF 1: ON Bit0 0: OFF 1: ON SW5-1...
Page 128 '21 • KX-T-380 '21 • KX-T-378 (2) Outdoor PCB setting Code Input Remark Outdoor address No. (Order of 10) Outdoor address No. (Order of 1) SW3-1 Inspection LED reset Normal★/Reset SW3-2 Auto backup operation Invailid★/Valid Spare SW3-3 Keep OFF SW3-4 Refrigerant quantity check Normal★/Check SW3-5...
Page 129 '21 • KX-T-380 (3) Indoor PCB setting Code Input Default setting Remark Indoor unit address No.(Order of 10) Indoor unit address No.(Order of 1) Outdoor unit address No.(Order of 10) Outdoor unit address No.(Order of 1) SW5-1 Superlink selection Automatic*/Previous SL Automatic SW5-2 Indoor unit address No.(Order of 100)
Page 130 '21 • KX-T-380 8. SYSTEM TROUBLESHOOTING PROCEDURE 8.1 Basics of troubleshooting Basic troubleshooting is to check/analyze/save data by connecting the Mente PC. Whenever arriving at the site, always connect the Mente PC before starting work. Method of error data analysis (Basic procedure) •...
Page 131 '21 • KX-T-380 8.2 Explanation of troubleshooting (a) Inspection of short-circuit on the power transistor module terminals Disconnect the wiring of compressor and check for short-circuit with a tester. Inspect between terminals of: P-U, P-V, P-W, N-U, N-V, N-W and P-N It will be easier to contact the tester at the following place at each terminal.
Page 132 '21 • KX-T-380 ■ Inverter checker for diagnosis of inverter output 8.2 Inverter checker for diagnosis of inverter output ● Checking method (a) Setup procedure of checker. 1) Power OFF (Turn off the breaker). 2) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. 3) Connect the wires U (Red) , V (White) and W (Black) of checker to the terminal of disconnected wires (U, V, W) from compressor respectively.
Page 133 '21 • KX-T-380 8.3 Contents of troubleshooting 2.3 Contents of troubleshooting (a) List of inspection displays 1) Indoor and outdoor units Remote 7-segment control Name of inspection Classification Page display error code – Remote control communication error Communication error – Duplicated indoor unit address Address setting error –...
Page 134 E53/ Suction pipe temperature sensor anomaly (Tho-S), Sensor wire E53/E55 Under-dome temperature sensor anomaly (Tho-C1, C2) breakage E55-1, 2 E54-1 High pressure sensor anomaly (PSH)/Low pressure sensor Sensor wire E54-2 anomaly (PSL) breakage '21 • KX-T-380 E56-1, 2 Heat dissipation fins temperature sensor anomaly (Tho-P1, P2) Sensor wire breakage E58-1, 2 Anomalous compressor by loss of synchronism System error...
Page 135 '21 • KX-T-380 (b) Troubleshooting Green Error code Content Keeps flashing Stays Off Indoor None Remote control: Operates but does not cool 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and supply air of indoor unit.
Page 136 '21 • KX-T-380 Green Error code Content Keeps flashing Stays Off Indoor Remote control: None Operates but does not heat 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation Check the temperature difference between return and supply air of indoor unit It is normal.
Page 137 '21 • KX-T-380 Green Error code Content Stays Off Stays Off Indoor Remote control: None Earth leakage breaker activated 7-segment display: Stays Off Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are the insulation resistance and resistance between Replace compressor.
Page 138 '21 • KX-T-380 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (1/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient time has elapsed after Does noise/ vibration occur during stopping the unit, it is...
Page 139 '21 • KX-T-380 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (2/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 1/3 Rearrange the piping to Are the pipes avoid contact with the contacting with the casing.
Page 140 '21 • KX-T-380 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (3/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 2/3 If insufficient cooling/ [Adjustment heating problem happens during commissioning] due to anomalous operating Does noise/vibration occur when the conditions at cooling/...
Page 141 '21 • KX-T-380 Green Error code Content Keeps flashing Stays Off Indoor Remote control: None Louver motor anomaly 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDTW, Diagnosis Countermeasure FDTS, FDTQ, FDK, FDE series ˜Check at the indoor unit side.
Page 142 '21 • KX-T-380 Green Power source system anomaly Content Error code Stays OFF Stays OFF Indoor None Remote control: (Power source to indoor unit PCB) 7-segment display: - Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDK series only Diagnosis Countermeasure AC 220-240V...
Page 143 '21 • KX-T-380 Green Error code Content Power source system anomaly Stays Off Stays Off Indoor Remote control: None (Power source to indoor unit PCB) 7-segment display: Stays Off 2 times flash Outdoor 5. Troubleshooting 1. Applicable model See note. Diagnosis Countermeasure AC 220-240V/220V...
Page 144 '21 • KX-T-380 Green Error code Content Power source system anomaly Stays OFF Stays OFF Indoor Remote control: None (Power source to indoor unit PCB) 7-segment display: - Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model FDU224, 280 Diagnosis Countermeasure FDFW...
Page 145 '21 • KX-T-380 Green Error code Content Power source system error Keeps lighting 3-time flash Indoor Remote control: None (Power source to remote control) 7-segment display: - Keeps lighting 2-time flash Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC series Diagnosis Countermeasure Is there any...
Page 146 '21 • KX-T-380 Green Error code Content Power source system error Keeps flashing 3-time flash Indoor Remote control: None (Power source to remote control) 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model See note. Diagnosis Countermeasure Is there any Correct it.
Page 147 '21 • KX-T-380 Green Content Error code Power source system error Keeps flashing 3-time flash Indoor Remote control: None (Power source to remote control) 7-segment display: - Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model FDK series only Diagnosis Countermeasure Is the connection of the...
Page 148 '21 • KX-T-380 Green Error code Content Indoor Remote control: Keeps flashing Stays Off WAIT WAIT 7-segment display: Outdoor Keeps flashing 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that is kept WAIT on displaying on the remote control for more than 2 is kept on WAIT...
Page 149 '21 • KX-T-380 Green Error code Content Keeps flashing Stays Off Indoor Remote control: WAIT WAIT 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case of fuse blown, how to check the inverter before replacement of fuse) there any short-circuit between phases of noise...
Page 150 '21 • KX-T-380 Green Error code Content Keeps flashing Stays Off Indoor Remote control: WAIT WAIT 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (No display on the remote control after power ON) No display on the remote control after power ON Does...
Page 151 '21 • KX-T-380 Green Error code Content Keeps flashing Stays Off Indoor Remote control: WAIT WAIT 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that is kept WAIT on displaying on the remote control for more than 2 is kept on WAIT...
Page 152 '21 • KX-T-380 Green Error code Content Stays OFF Stays Off Indoor Remote control: WAIT WAIT 7-segment display: Stays OFF Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that LED on outdoor unit control PCB stays OFF) In case that LED on outdoor unit control PCB stays Once turn OFF the breaker...
Page 153 '21 • KX-T-380 Green Error code Content Stays Off Stays Off Indoor Remote control: WAIT WAIT 7-segment display: Stays Off Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case of fuse blown, how to check the inverter before replacement of fuse) there any short-circuit between phases of noise...
Page 154 '21 • KX-T-380 Green Error code Content Stays OFF Stays Off Indoor 〔 No display 〕 Remote control: [No display] 7-segment display: Stays OFF Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (No display on the remote control after power ON) No display on the remote control after power ON...
Page 155 '21 • KX-T-380 Green Error code Content Remote control Keeps flashing Stays Off Indoor Remote control: communication error 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it possible to Malfunction by temporary reset normally by the power source reset? noise...
Page 156 '21 • KX-T-380 Green Error code Content Keeps flashing 1-time flash Indoor Remote control: Duplicated indoor unit address 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the number of Review number of connected indoor units up connected units.
Page 157 '21 • KX-T-380 Green Error code Content Keeps flashing 2-time flash Indoor Remote control: E3/5 Outdoor unit signal line error 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E3 is a communication error that occurs when communication between indoor and outdoor units is not established at all.
Page 158 '21 • KX-T-380 Green Error code Content Keeps flashing *See below Indoor Remote control: Communication error during operation 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * In case that indoor unit red LED flashes 2 times Note (1) Check the connection (disconnection, looseness) of signal wires at outdoor unit terminal block Is the...
Page 159 '21 • KX-T-380 Green Indoor heat exchanger Error code Content Keeps flashing 1-time flash Indoor Remote control: temperature sensor anomaly (Thi-R) 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of temperature sensor Insert the connector connected properly ?
Page 160 '21 • KX-T-380 Green Indoor return air Error code Content Keeps flashing 1-time flash Indoor Remote control: temperature sensor anomaly (Thi-A) 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector temperature sensor connected securely.
Page 161 '21 • KX-T-380 Green Error code Content Keeps flashing 1-time flash Indoor Remote control: Drain trouble 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDTW, FDTQ, Diagnosis Countermeasure FDTS, FDUT, FDU, FDUM, and FDU650, 1100F series Check the error data in the remote control.
Page 162 '21 • KX-T-380 Green Error code Content Excessive number of indoor units (moe than 17 units) Keeps flashing Stays Off Indoor Remote control: by controlling one remoto control 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 163 '21 • KX-T-380 Green Green Content Error code Error code Content Address setting error Address setting error Keeps flashing Stays OFF Indoor Remote control: Remote control: of indoor units master and slave indoor units Indoor Keeps ﬂashing Keeps ﬂashing 7-segment display:- Keeps flashing Stays OFF Outdoor 5.
Page 164 '21 • KX-T-380 Green Error code Content Address setting error Keeps flashing 1-time flash Indoor Remote control: by mixed setting method 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the automatic setting and Review address setting.
Page 165 '21 • KX-T-380 Green Error code Content Indoor DC fan motor anomaly Keeps flashing 1-time flash Indoor Remote control: (FDT, FDTC, FDK series) 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDK series only Diagnosis Countermeasure Does any...
Page 166 '21 • KX-T-380 Green Content Error code Indoor DC fan motor anomaly Keeps flashing 1-time flash Indoor Remote control: 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDTW, FDTS, FDU45-160, Diagnosis Countermeasure FDUM, FDUT71, FDE, FDFW series Does any foreign material...
Page 167 '21 • KX-T-380 Green Content Error code Indoor DC fan motor anomaly Keeps flashing 1 (2)-time flash Indoor Remote control: 7-segment display:- Keeps flashing Stays OFF Outdoor Note(1) Value in ( ) is for FM2. 5. Troubleshooting 1. Applicable model FDU224, 280 Diagnosis Countermeasure...
Page 168 '21 • KX-T-380 Green Content Error code Address setting error of Keeps flashing 1-ime flash Indoor Remote control: master and slave indoor units 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model Except heat recovery 3-pipe Diagnosis Countermeasure combination system Is the address...
Page 169 '21 • KX-T-380 Green Error code Content Indoor unit operation check, Keeps flashing 1-time flash Indoor Remote control: drain pump motor check mode anomaly 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON.
Page 170 '21 • KX-T-380 Green Content Error code Indoor DC fan motor rotation Keeps flashing 1-time flash Indoor Remote control: speed anomaly (FDT, FDTC, FDK series) 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDK series only Diagnosis Countermeasure Does any...
Page 171 '21 • KX-T-380 Green Content Error code Indoor DC fan motor rotation speed Keeps flashing 1-time flash Indoor Remote control: anomaly 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDTW, FDTS, FDU45-160, Diagnosis Countermeasure FDUM, FDUT71, FDE, FDFW series Does any foreign material...
Page 172 '21 • KX-T-380 Green Content Error code Indoor DC fan motor rotation speed Keeps flashing 1 (2)-time flash Indoor Remote control: anomaly 7-segment display:- Keeps flashing Stays OFF Outdoor Note(1) Value in ( ) is for FM2. 5. Troubleshooting 1. Applicable model FDU224, 280 Diagnosis Countermeasure...
Page 173 '21 • KX-T-380 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: temperature sensor anomaly (Thc) 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector temperature sensor connected securely.
Page 174 '21 • KX-T-380 Green Content Error code Keeps flashing Stays OFF Indoor Duplicated outdoor unit address No. Remote control: 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
Page 175 '21 • KX-T-380 Green Content Error code Open of Phase (L1, L2, N) on Keeps flashing Stays OFF Indoor Remote control: power source at primary side 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of...
Page 176 '21 • KX-T-380 Green Discharge pipe temperature Content Error code Keeps flashing Stays OFF Indoor Remote control: error (Tho-D1, D2) E36-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E36-1: Tho-D1, E36-2: Tho-D2 *2 E36-1: 1-time flash, E36-2: 2-time flash 5.
Page 177 '21 • KX-T-380 Outdoor heat exchanger Green Content Error code temperature sensor (Tho-R) and subcooling coil Keeps flashing Stays OFF Indoor Remote control: temperature sensor (Tho-SC,-H) anomaly E37-1, 2, 3, 4, 5, 6*1 7-segment display: Keeps flashing Outdoor *1 E37-1: 1-time flash (Tho-R1), E37-2: 2-time flash (Tho-R2), E37-3: 3-time flash (Tho-R3), E37-4: 4-time flash (Tho-R4), E37-5: 5-time flash (Tho-SC), E37-6: 6-time flash (Tho-H) 5.
Page 178 '21 • KX-T-380 Green Outdoor air temperature Content Error code Keeps flashing Stays OFF Indoor Remote control: sensor anomaly (Tho-A) 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
Page 179 '21 • KX-T-380 Green Content Error code Discharge pipe temperature Keeps flashing Stays OFF Indoor Remote control: sensor anomaly (Tho-D1, D2) E39-1, 2*1 7-segment display: Keeps flashing Outdoor *1 E39-1: Tho-D1, E39-2: Tho-D2, *2 E39-1: 1-time flash, E39-2: 2-time flash 5.
Page 180 '21 • KX-T-380 Green High pressure anomaly Content Error code Keeps flashing Stays OFF Indoor Remote control: (63H1-1, 2 activated) 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
Page 181 '21 • KX-T-380 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Current cut (CM1, CM2) E42-1, 2* 7-segment display: Keeps flashing Outdoor *1 E42-1: CM1, E42-2: CM2 *2 E42-1: 1-time flash, E42-2: 2-time flash 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure...
Page 182 '21 • KX-T-380 Green Content Error code Excessive number of indoor units connected, Keeps flashing Stays OFF Indoor Remote control: excessive total capacity of connection E43-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E43-1/1-time flash: Excessive number of indoor units connected, E43-2/2-time flash:Excessive capacity of indoor units connection 5.
Page 183 '21 • KX-T-380 Green Content Error code Liquid flooding anomaly Keeps flashing Stays OFF Indoor Remote control: (CM1, CM2) E44-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E44-1: CM1, E44-2 : CM2 *2 E44-1: 1-time flash, E44-2: 2-time flash 5.
Page 184 '21 • KX-T-380 Green Content Error code Communication error between Keeps flashing Stays OFF Indoor Remote control: inverter PCB and outdoor unit control PCB E45-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E45-1: INV1, E45-2: INV2 *2 E45-1: 1-time flash, E45-2: 2-time flash 5.
Page 185 '21 • KX-T-380 Green Content Error code Mixed address setting methods Keeps flashing Stays OFF Indoor Remote control: coexistent in same network 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions.
Page 186 '21 • KX-T-380 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Outdoor DC fan motor anomaly(1/2) E48-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E48-1: 1-time flash (FMo1), E48-2 : 2-time flash (FMo2) Inspect also the fan motor 2 even if it is E48-1. 5.
Page 187 '21 • KX-T-380 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Outdoor DC fan motor anomaly(2/2) E48-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E48-1: 1-time flash (FMo1), E48-2 : 2-time flash (FMo2) Inspect also the fan motor 2 even if it is E48-1. 5.
Page 188 '21 • KX-T-380 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Low pressure anomaly 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions Save data for 30 minutes before stopping in Mente PC.
Page 189 '21 • KX-T-380 Green Content Error code Suction pipe temperature sensor anomaly (Tho-S), Keeps flashing Stays OFF Indoor E53/E55*1 Remote control: E53/E55-1, 2 Under-dome temperature sensor anomaly (Tho-C1, C2) 7-segment display: Keeps flashing Outdoor *1 E53 : Tho-S, E55-1 : Tho-C1, E55-2: Tho-C2 *2 E53, E55-1: 1-time flash, E55-2: 2-time flash 5.
Page 190 '21 • KX-T-380 Green Content Error code High pressure sensor anomaly (PSH) Keeps flashing Stays OFF Indoor Remote control: E54-1, 2 *1 Low pressure sensor anomaly (PSL) 7-segment display: Keeps flashing Outdoor *1 E54-1: 1-time flash (PSL), E54-2 : 2-time flash (PSH) 5.
Page 191 '21 • KX-T-380 Green Content Error code Power transistor temperature Keeps flashing Stays OFF Indoor Remote control: sensor anomaly (Tho-P1, P2) E56-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E56-1/1-time flash:Tho-P1 anomaly, E56-2/2-time flash: Tho-P2-anomaly 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure...
Page 192 '21 • KX-T-380 Green Content Error code Anomalous compressor Keeps flashing Stays OFF Indoor Remote control: by loss of synchronism E58-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E58-1: CM1, E58-2: CM2 *2 E58-1: 1-time flash, E58-2: 2-time flash 5.
Page 193 '21 • KX-T-380 Green Compressor startup Content Error code Keeps flashing Stays OFF Indoor Remote control: failure (CM1,CM2) E59-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E59-1: CM1, E59-2: CM2 *2 E59-1: 1-time flash, E59-2: 2-time flash 5. Troubleshooting 1.
Page 194 '21 • KX-T-380 Green Content Error code Communications error between Keeps flashing Stays OFF Indoor Remote control: the master unit and slave units E61-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E61-1/1-time flash: Slave unit 1, E61-2/2-time flash: Slave unit 2 5.
Page 195 '21 • KX-T-380 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Emergency stop 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Indoor unit Diagnosis Countermeasure Check and save the data of operating conditions. Save data for 30 minutes before stopping in Mente PC.
Page 196 '21 • KX-T-380 8.4 Outdoor unit control PCB exchange procedure PCB012D105 Precautions for Safety • Since the following precaution is the important contents for safety, be sure to observe them. WARNING and CAUTION are described as follows: Indicates an imminently hazardous situation which will result in death or serious injury if WARNING proper safety procedures and instructions are not adhered to.
Page 197 '21 • KX-T-380 8.5 Outdoor unit power PCB exchange procedure PCB012D106 Precautions for Safety • Since the following precaution is the important contents for safety, be sure to observe them. WARNING and CAUTION are described as follows: Indicates an imminently hazardous situation which will result in death or serious injury if WARNING proper safety procedures and instructions are not adhered to.
Page 198 '21 • KX-T-380 8.6 Outdoor unit noise filter PCB exchange procedure PCB012D107 Precautions for Safety • Since the following precaution is the important contents for safety, be sure to observe them. WARNING and CAUTION are described as follows: Indicates an imminently hazardous situation which will result in death or serious injury if WARNING proper safety procedures and instructions are not adhered to.
Page 199 '21 • KX-T-380 8.7 Outdoor unit inverter PCB exchange procedure PCB012D108 (1) Models FDC(S)280, 335, 475, 500, 560(C)KXZA2 Precautions for Safety • Since the following precaution is the important contents for safety, be sure to observe them. 　 WARNING and CAUTION are described as follows: Indicates an imminently hazardous situation which will result in death or serious WARNING injury if proper safety procedures and instructions are not adhered to.
Page 200 '21 • KX-T-380 *Presence and shape of electric Never plug connectors After elapsing 3 minutes component may vary according in half inserted from power OFF to model. CNIP CNR2 TB11 CNR1 Niplocker attach point CNR3 CNI2 Spacer JSW10 attach point TB1 / T1 LED1 TB2 / T2...
Page 201 '21 • KX-T-380 PCB012D108A (2) Models FDC(S)400, 450(C)KXZA2 Precautions for Safety • Since the following precaution is the important contents for safety, be sure to observe them. 　 WARNING and CAUTION are described as follows: Indicates an imminently hazardous situation which will result in death or serious WARNING injury if proper safety procedures and instructions are not adhered to.
Page 202 '21 • KX-T-380 *Presence and shape of electric After elapsing 3 minutes Never plug connectors component may vary according in half inserted from power OFF to model. CNIP CNR2 TB11 CNR1 Niplocker attach point CNR3 CNI2 Spacer JSW10 attach point LED1 (Yellow) Parts No.
Page 203 '21 • KX-T-380 8.8 Check points of inverter outdoor unit (1) Models FDC(S)400, 450(C)KXZA2...
Page 204 '21 • KX-T-380 (2) Models FDC(S)280-335(C)KXZA2, 475-560(C)KXZA2 (FDC(S)280-335(C)KXZA2 are 1 inverter system.)
Page 205 '21 • KX-T-380 9. APPLICATION DATA Designed for R410A refrigerant ● 9.1 Installation of outdoor unit PSC012D161 ● (1) Heat pump type Outdoor unit capacity ● FDC2 80 –1680 ● ◎This installation manual deals with outdoor units and general installation speciﬁcations only. For indoor units, please refer to the respective installation manuals ●...
Page 206 '21 • KX-T-380 Notabilia as a unit designed for R410A Dedicated R410A tools Gauge manifold Do not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional ● refrigerant. Charge hose A cylinder containing R410A has a pink indication mark on the top.
Page 207 ● ● Do not perform any repairs or modiﬁcations by yourself. Consult the dealer if the unit requires repair. Do not step onto the outdoor unit. You may incur injury from a drop or fall. If you repair or modify the unit, it can cause water leaks, electric shocks or ﬁre. '21 •...
Page 208 1120 High-COP combination（335+400+400 3ー80 896ー1456 '21 • KX-T-380 1350 Unit Base Normally, it is desirable that a A base used for a former model Please use it for renewal installation. base as speciﬁed in the drawing is wrongly oriented and not (Please add a base on the center) Anchor bolt positions above is provided.
Page 209 '21 • KX-T-380 Thickness and size: Please select proper pipes according to the pipe size selection guideline. ● (Since this unit uses R410A, always use 1/2H pipes of a speciﬁed minimum thickness or thicker for all pipes of φ19.05 or larger, because the pressure resistance requirement is not satisﬁed with O-type pipes).
Page 210 '21 • KX-T-380 (d) Indoor unit side branching pipe – Indoor unit: Section D in Figure 1 Indoor unit connection pipe size table Capacity Gas pipe Liquid pipe φ 9.52× t 0.8 15, 22, 28 φ 6.35× t 0.8 φ 12.7× t 0.8 36, 45, 56 φ15.88×...
Page 211 φ Please use C1220T-1/2H for 19.05 or larger pipes. Pipe sizes applicable to European installations are shown in parentheses. *1: When connecting indoor units of 280 at the downstream and the main gas pipe is of φ22.22 or larger, use the pipe of φ22.22x t1.0. '21 •...
Page 212 Floor surface Floor surface Floor surface '21 • KX-T-380 (2) Piping work CAUTION Important If you tighten it without using double spanners, you may deform the service valve, which can cause an inﬂow of nitrogen gas Please take care so that installed pipes may not touch components within a unit. ●...
Page 213 '21 • KX-T-380 4-3. Air tightness test and air purge (1) Air tightness test ① Although an outdoor unit itself has been tested for air tightness at the factory, please check the connected pipes and indoor units for air tightness from the check joint of the service valve on the outdoor unit side.
Page 214 '21 • KX-T-380 4-4. Additional refrigerant charge Charge additional refrigerant in the liquid state. Be sure to measure the quantity with a scale in adding refrigerant. If you cannot charge all refrigerant with the outdoor unit lying idle, charge it with the unit running in the test run mode. (For the test run method, please refer to Section 8) If operated for a long time with insufﬁcient refrigerant the compressor will be damaged.
Page 215 '21 • KX-T-380 Wires for connecting indoor Band (accessory) Exterior tape Pipe cover (accessory) and outdoor units Gas piping Liquid piping insulation 5. DRAINAGE Where water drained from the outdoor unit may freeze, connect the drain pipe using option drain elbow and drain grommet. ●...
Page 216 When the ambient dew point temperature becomes 28℃ or higher, or the relative humidity becomes 80% or higher, add further 10 to 20 mm thick heat insulation material. '21 • KX-T-380 6-2. Method of connecting power cables (1) Method of leading out cables As shown on the drawing in Section 4-2 (1), cables can be laid through the front, right, left or bottom casing.
Page 217 When units of FD○△△KXE6 Series, FD○△△KXZE1 series and units of FD○A△△KXE4 and 5 Series are connected in a mixture: Standard resistance value=46,000/[(Number of connected FD ○ A △△ KXE4 and 5 Series units x 5) + (Number of connected FD ○△△ KXE6 and KXZ Series units x 9)] The number of connected units includes those of indoor units, outdoor units and SL devices.
Page 218 '21 • KX-T-380 (2) When the remote control wire runs parallel to another power source wire or when it is subject to outside noise, such as from a high-frequency device, use shielded wire. (Be sure to ground only one end of the shielded wire.) Ⅱ...
Page 219 '21 • KX-T-380 ● Summary of address setting methods (ﬁgures in [ ] should be used with previous SL) Units supporting new SL Units NOT supporting new SL Indoor unit address setting Outdoor unit address setting Indoor unit address setting Outdoor unit address setting Indoor No.
Page 220 point a desired number. Outdoor PCB SW1, 2 (green) For setting outdoor No. (The ten’s and one’s) For ten’s place For one’s place '21 • KX-T-380 (1) In the case of a single refrigerant system installation (Generally applicable to new SL/previous SL, use ﬁgures in [ ] with previous SL.) ①...
Page 221 '21 • KX-T-380 ［STEP1］［STEP2］ Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit (Master) [01] (Slave) [01 (02)] (Master) [03] (Slave) [(03)(04)] (Master) [01] (Slave) [01 (02)] (Master) [03] (Slave) [(03)(04)] SW4-7 0FF SW4-7 ON SW4-7 0FF SW4-7 ON...
Page 222 '21 • KX-T-380 (2) When plural indoor units are connected to the remote control. When plural indoor units are connected, you can change their addresses without altering their cable connection. Item Operation Display ① Press the AIR CON Unit No. switch for 3 seconds or longer. [CHANGE ADD▼] Address change mode ②...
Page 223 →Returns to normal condition. '21 • KX-T-380 Address setting failure indication Code Content of display Please check Are signal lines connected properly without any loose connections? The number of the indoor units that can be actually communicated with is less Input the number of connected indoor units again.
Page 224 Polarity is deﬁned. (Automatic address) Completed normally. '21 • KX-T-380 By changing the allocation of external input function (P07-10) on the 7-segment, functions of external input terminal External output function of CnZ1 can be changed may be selected. Inputting signals to external input terminals enable the following functions. by changing P06 on 7-segment indicator.
Page 225 '21 • KX-T-380 8. TEST OPERATION AND TRANSFER 8-1. Before starting operation (1) Make sure that a measurement between the power source terminal block and ground, when measured with a 500V megger, is greater than 1 MΩ. When the unit is left for a long time with power OFF or just after the installation, there is possibility that the refrigerant is accumulated in the compressor and the insulation resistance between the contact terminals for power source and grounding decreases to 1MΩ...
Page 226 '21 • KX-T-380 Error display on 7-segment indicator after ending the check operation Code indicato Data indicator Display contents Check following points ・ Isn’t the service valve of outdoor unit left open? Service valve is closed. ・ Is the low pressure sensor normal? (Detected pressure can be seen on (Refrigerant circuit is shut off partially.) the 7-segment indicator.)
Page 227 '21 • KX-T-380 (3) Method of refrigerant quantity check operation (a) Starting the refrigerant quantity check operation ・ Conﬁrm that all of the following switches are turned OFF; SW3-2 (Auto backup operation), SW3-6 (Pipe wash mode), SW3-7 (Forced cooling/heating mode), SW5-1 (Test run), SW5-2 (Test run cooling setting), SW5-3 (Pump-down operation) and SW5-6, 7, 8 (Capacity measurement mode).
Page 228 '21 • KX-T-380 8-4. Test operation (1) Test run from an outdoor unit. Whether external inputs are set to ON or OFF, you can start a test run by using the SW5-1 and SW5-2 switches provided on the outdoor unit board. Select the test run mode ﬁrst.
Page 229 '21 • KX-T-380 Designed for R410A refrigerant ● PSC012D161A ● (2) Cooling only type Outdoor unit capacity ● F DC2 80 –1680C ● ◎This installation manual deals with outdoor units and general installation speciﬁcations only. For indoor units, please refer to the respective installation manuals ●...
Page 230 '21 • KX-T-380 Notabilia as a unit designed for R410A Dedicated R410A tools Gauge manifold Do not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional ● refrigerant. Charge hose A cylinder containing R410A has a pink indication mark on the top.
Page 231 ● ● Do not perform any repairs or modiﬁcations by yourself. Consult the dealer if the unit requires repair. Do not step onto the outdoor unit. If you repair or modify the unit, it can cause water leaks, electric shocks or ﬁre. You may incur injury from a drop or fall.
Page 232 1120 High-COP combination（335+400+400 3ー80 896ー1456 '21 • KX-T-380 1350 Unit Base Normally, it is desirable that a A base used for a former model Please use it for renewal installation. base as speciﬁed in the drawing is wrongly oriented and not (Please add a base on the center) Anchor bolt positions above is provided.
Page 233 '21 • KX-T-380 Thickness and size: Please select proper pipes according to the pipe size selection guideline. ● (Since this unit uses R410A, always use 1/2H pipes of a speciﬁed minimum thickness or thicker for all pipes of φ19.05 or larger, because the pressure resistance requirement is not satisﬁed with O-type pipes).
Page 234 '21 • KX-T-380 (d) Indoor unit side branching pipe – Indoor unit: Section D in Figure 1 Indoor unit connection pipe size table Capacity Gas pipe Liquid pipe φ 9.52× t 0.8 15, 22, 28 φ 6.35× t 0.8 φ 12.7× t 0.8 36, 45, 56 φ15.88×...
Page 235 Please use C1220T-1/2H for φ 19.05 or larger pipes. Pipe sizes applicable to European installations are shown in parentheses. *1: When connecting indoor units of 280 at the downstream and the main gas pipe is of φ22.22 or larger, use the pipe of φ22.22x t1.0. '21 •...
Page 236 Floor surface Floor surface Floor surface '21 • KX-T-380 (2) Piping work CAUTION Important If you tighten it without using double spanners, you may deform the service valve, which can cause an inﬂow of nitrogen gas Please take care so that installed pipes may not touch components within a unit. ●...
Page 237 '21 • KX-T-380 4-3. Air tightness test and air purge (1) Air tightness test ① Although an outdoor unit itself has been tested for air tightness at the factory, please check the connected pipes and indoor units for air tightness from the check joint of the service valve on the outdoor unit side.
Page 238 '21 • KX-T-380 4-4. Additional refrigerant charge Charge additional refrigerant in the liquid state. Be sure to measure the quantity with a scale in adding refrigerant. If you cannot charge all refrigerant with the outdoor unit lying idle, charge it with the unit running in the test run mode. (For the test run method, please refer to Section 8) If operated for a long time with insufﬁcient refrigerant the compressor will be damaged.
Page 239 '21 • KX-T-380 Wires for connecting indoor Band (accessory) Exterior tape Pipe cover (accessory) and outdoor units Gas piping Liquid piping insulation 5. DRAINAGE Where water drained from the outdoor unit may freeze, connect the drain pipe using option drain elbow and drain grommet. ●...
Page 240 When the ambient dew point temperature becomes 28℃ or higher, or the relative humidity becomes 80% or higher, add further 10 to 20 mm thick heat insulation material. '21 • KX-T-380 6-2. Method of connecting power cables (1) Method of leading out cables As shown on the drawing in Section 4-2 (1), cables can be laid through the front, right, left or bottom casing.
Page 241 When units of FD○△△KXE6 Series, FD○△△KXZE1 series and units of FD○A△△KXE4 and 5 Series are connected in a mixture: Standard resistance value=46,000/[(Number of connected FD ○ A △△ KXE4 and 5 Series units x 5) + (Number of connected FD ○△△ KXE6 and KXZ Series units x 9)] The number of connected units includes those of indoor units, outdoor units and SL devices.
Page 242 '21 • KX-T-380 (2) When the remote control wire runs parallel to another power source wire or when it is subject to outside noise, such as from a high-frequency device, use shielded wire. (Be sure to ground only one end of the shielded wire.) Ⅱ...
Page 243 '21 • KX-T-380 ● Summary of address setting methods (ﬁgures in [ ] should be used with previous SL) Units supporting new SL Units NOT supporting new SL Indoor unit address setting Outdoor unit address setting Indoor unit address setting Outdoor unit address setting Indoor No.
Page 244 point a desired number. Outdoor PCB SW1, 2 (red) For setting outdoor No. (The ten’s and one’s) For ten’s place For one’s place '21 • KX-T-380 (1) In the case of a single refrigerant system installation (Generally applicable to new SL/previous SL, use ﬁgures in [ ] with previous SL.) ①...
Page 245 '21 • KX-T-380 ［STEP1］［STEP2］ Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit (Master) [01] (Slave) [01 (02)] (Master) [03] (Slave) [(03)(04)] (Master) [01] (Slave) [01 (02)] (Master) [03] (Slave) [(03)(04)] SW4-7 0FF SW4-7 ON SW4-7 0FF SW4-7 ON...
Page 246 '21 • KX-T-380 (2) When plural indoor units are connected to the remote control. When plural indoor units are connected, you can change their addresses without altering their cable connection. Item Operation Display ① Press the AIR CON Unit No. switch for 3 seconds or longer. [CHANGE ADD▼] Address change mode ②...
Page 247 →Returns to normal condition. '21 • KX-T-380 Address setting failure indication Code Content of display Please check Are signal lines connected properly without any loose connections? The number of the indoor units that can be actually communicated with is less Input the number of connected indoor units again.
Page 248 Polarity is deﬁned. (Automatic address) Completed normally. '21 • KX-T-380 By changing the allocation of external input function (P07-10) on the 7-segment, functions of external input terminal External output function of CnZ1 can be changed may be selected. Inputting signals to external input terminals enable the following functions. by changing P06 on 7-segment indicator.
Page 249 '21 • KX-T-380 8. TEST OPERATION AND TRANSFER 8-1. Before starting operation (1) Make sure that a measurement between the power source terminal block and ground, when measured with a 500V megger, is greater than 1 MΩ. When the unit is left for a long time with power OFF or just after the installation, there is possibility that the refrigerant is accumulated in the compressor and the insulation resistance between the contact terminals for power source and grounding decreases to 1MΩ...
Page 250 '21 • KX-T-380 Error display on 7-segment indicator after ending the check operation Code indicato Data indicator Display contents Check following points ・ Isn’t the service valve of outdoor unit left open? Service valve is closed. ・ Is the low pressure sensor normal? (Detected pressure can be seen on (Refrigerant circuit is shut off partially.) the 7-segment indicator.)
Page 251 '21 • KX-T-380 (3) Method of refrigerant quantity check operation (a) Starting the refrigerant quantity check operation ・ Conﬁrm that all of the following switches are turned OFF; SW3-2 (Auto backup operation), SW3-6 (Pipe wash mode), SW3-7 (Forced cooling/heating mode), SW5-1 (Test run), SW5-2 (Test run cooling setting), SW5-3 (Pump-down operation) and SW5-6, 7, 8 (Capacity measurement mode).
Page 252 '21 • KX-T-380 8-4. Test operation (1) Test run from an outdoor unit. Whether external inputs are set to ON or OFF, you can start a test run by using the SW5-1 and SW5-2 switches provided on the outdoor unit board. Select the test run mode ﬁrst.
Page 253 '21 • KX-T-380 '21 • KX-T-381 ※ ■Refrigerant charge quantity calculation notes in case outdoor unit capacity is 475,500 and 560 ※The combination unit is not applicable ●In case when the outdoor unit capacity is 475ー560 and the pipe length (X,Y) is in the following conditions, 　...
Page 254 '21 • KX-T-380 9.2 Instructions for installing the branch pipe set PSB012D855D ◎ This manual describes the speciﬁcations of branching pipe set and header set installation. For outdoor unit installation and indoor unit installation, please refer to the respective installation manuals supplied with your outdoor unit and indoor unit. ◎...
Page 255 '21 • KX-T-380 Branching pipe set type Gas side Liquid side Different diameter pipe joint HEAD4-22-1G None IDφ12.7 IDφ9.52 HEAD6-180-1G IDφ 15.88 1 pc. 1 pc. IDφ9.52 HEAD8-371-2 IDφ15.88 1 pc. 1 pc. IDφ12.7 IDφ9.52 HEAD8-540-3 1 pc. 1 pc. IDφ15.88 IDφ12.7 IDφ9.52...
Page 256 '21 • KX-T-380 ・In the case of a header set (model type HEAD) Gas side Horizontal Floor surface Floor surface Floor surface Horizontal Iiquid side Horizontal Floor surface Floor surface Floor surface ④ When using the outdoor unit’ s branch pipe set, make sure to secure a straight section of 500mm or more for both the gas and liquid pipes before branching them. Outdoor unit 1 Outdoor unit 2 Outdoor unit 3...
Page 257 '21 • KX-T-380 Total capacity downstream Header set model type Number of branches less than 180 HEAD4-22-1G Up to 4 branches 180 or higher – less than 371 HEAD6-180-1G Up to 6 branches 371 or higher – less than 540 HEAD8-371-2 Up to 8 branches 540 or more...
Page 258 '21 • KX-T-380 9.3 Procedure to attach or remove the service panel Purpose ・ To be easier to remove / attach panels ・ To improve serviceability Point of change ・ Handles are added on panel to help easier removal / attachment. ・...
Page 259 '21 • KX-T-380 Removal and attachment of rear panel ・ Removal ① Slide-up the front panel about 10mm to release claws. ② After the claws are released, pull the front panel to this side to remove. ・ Attachment Hook all claws as the reverse order of removal. Location of claws on rear panel Removal and attachment of side panel ・...
Page 260 '21 • KX-T-380 9.4 Voltage check point Control PCB LED 1 Red LED 2 Green Voltage across C 38 Voltage C 11 5V voltage for CPU 13 V voltage for EEV The above voltages can also be measured on the power source board. LED 3 Green ...
Page 261 '21 • KX-T-380 Power PCB 13 V voltage for Relay 5V voltage for CPU 13 V voltage for EEV Vdc for FMo Voltage C 812 Vsp signal for FMo2 15V voltage for FMo Voltage C 811 Vsp signal for FMo1...
Page 262 '21 • KX-T-380 Inverter PCB 15V voltage for Inverter 5V voltage for CPU LED 1 Yellow High voltage measurement POINT FDC400, Others 450KXZE2 TB10 TB12 TB13 TB10 TB10 TB12 Capacitor TB13 Others FDC400,450KXZE2...
Page 263 '21 • KX-T-380 APPENDIX : Corrosion protection treatment series Production by order KXZ outdoor series are available with special coating applied for not only sheet metals but also small parts in order to prevent salt corrosion caused by sea breeze in area along Sea breeze coast line (Within approximately 500m from coast line).
Page 264 '21 • KX-T-380 APPENDIX : Attaching option parts Outdoor units can be equipped with option parts as snow protection hood. Sample image of attaching parts are shown right. Please refer to the option parts drawing and manufacture them at the local distributor.
Page 265 '21 • KX-T-380 For FDC(S)400-560(C)KXZA2 <Front hood> <Rear hood> Minimum required opening area：656cm Minimum required opening area：656cm <Right hood> <Left hood> Minimum required opening area:181cm Minimum required opening area:181cm <Top hood for all KXZA2 models> Minimum required opening area：765cm Don’t ride on the R corner ×4...
Page 266 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 2-3, Marunouchi 3-chome, Chiyoda-ku, Tokyo, 100-8332, Japan http://www.mhi-mth.co.jp/en/ Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

Mitsubishi Heavy Industries KXZ Series Technical Manual

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Page 115: Table Of Contents

Page 117: C67 Protection Control Status

Page 118: C68 Compressor Stop Causes

Page 125: Protection Control Causes

Page 126: Compressor Error Causes

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