Download Print this page

Mitsubishi Electric MSZ-LN-VG Series Service Manual

Outdoor unit hfc utilized r32
Hide thumbs

Advertisement

OUTDOOR UNIT
SERVICE MANUAL
Models
MXZ-2F33VF
-
E1
MXZ-2F33VF2
-
E1
MXZ-2F33VF3
-
E1
MXZ-2F42VF
-
E1
MXZ-2F42VF2
-
E1
MXZ-2F42VF3
-
E1
MXZ-2F53VF
-
E1
MXZ-2F53VF2
-
E1
MXZ-2F53VF3
-
E1
MXZ-2F53VFH
-
E1
MXZ-2F53VFH2
-
MXZ-2F53VFH3
-
MXZ-3F54VF
-
-
-
MXZ-2F33VF
MXZ-2F42VF
MXZ-2F53VF
MXZ-2F53VFH
MXZ-2F33VF3
MXZ-2F42VF3
MXZ-2F53VF3
MXZ-2F53VFH3
MXZ-3F68VF
,
ET1
MXZ-3F68VF2
,
ET1
MXZ-3F68VF3
,
ET1
MXZ-4F72VF
,
ET1
MXZ-4F72VF2
,
ET1
MXZ-4F72VF3
,
ET1
MXZ-4F80VF2
,
ET1
MXZ-4F80VF3
,
ET1
,
ET1
Indoor unit service manual
E1
MSZ-LN•VG Series (OBH766)
MSZ-LN•VG2 Series (OBH766)
E1
MSZ-EF•VG Series (OBH589)
,
,
,
E2
ET2
MSZ-AP•VF Series (OBH799)
,
MSZ-AP•VG Series (OBH788)
,
MSZ-BT•VG Series (OBH849)
MXZ-2F33VF2
MXZ-2F42VF2
MXZ-2F53VF2
MXZ-2F53VFH2
Revision D:
• MXZ-2F33VF3-
, MXZ-2F53VF3-
ET1
, MXZ-3F54VF3-
E1
,
, MXZ-4F72VF3-
E1
ET1
4F80VF3-
,
E1
ET1
OBH790 REVISED EDITION-C is void.
HFC
utilized
R32
-
,
,
,
E1
ET1
E2
-
,
E1
ET1
-
,
E1
ET1
-
,
,
,
E1
ET1
E2
-
,
E1
ET1
-
,
E1
ET1
-
,
E1
ET1
-
,
E1
ET1
MLZ-KP•VF Series (OBH801)
MFZ-KT•VG Series (OBH843)
SLZ-M•FA Series (OCH522)
SEZ-M•DA Series (HWE17040)
PCA-M•KA Series (OCH659)
PEAD-M•JA(L) Series (HWE16130)
CONTENTS
1. TECHNICAL CHANGES ··································· 4
2. SAFETY PRECAUTION ···································· 5
3. PART NAMES AND FUNCTIONS ··················· 16
4. SPECIFICATION ·············································· 17
5. NOISE CRITERIA CURVES ···························· 37
6. OUTLINES AND DIMENSIONS ······················ 39
7. WIRING DIAGRAM ·········································· 42
8. REFRIGERANT SYSTEM DIAGRAM ············· 60
9. PERFORMANCE CURVES ····························· 66
10. ACTUATOR CONTROL ··································· 91
11. SERVICE FUNCTIONS ···································· 92
12. TROUBLESHOOTING ····································· 97
13. DISASSEMBLY INSTRUCTIONS ·················· 124
PARTS CATALOG (OBB790)
,
, MXZ-2F42VF3-
E1
ET1
E1
,
, MXZ-2F53VFH3-
E1
ET1
,
, MXZ-3F68VF3-
E1
ET1
,
and MXZ-
E1
ET1
have been added.
No. OBH790
REVISED EDITION-D
ET2
ET2
,

Advertisement

loading

  Related Manuals for Mitsubishi Electric MSZ-LN-VG Series

  Summary of Contents for Mitsubishi Electric MSZ-LN-VG Series

  • Page 1: Table Of Contents

    Revision D: • MXZ-2F33VF3- , MXZ-2F42VF3- , MXZ-2F53VF3- , MXZ-2F53VFH3- , MXZ-3F54VF3- , MXZ-3F68VF3- , MXZ-4F72VF3- and MXZ- 4F80VF3- have been added. OBH790 REVISED EDITION-C is void. OUTDOOR UNIT No. OBH790 REVISED EDITION-D utilized SERVICE MANUAL Models MXZ-2F33VF MXZ-3F68VF MXZ-2F33VF2 MXZ-3F68VF2 MXZ-2F33VF3 MXZ-3F68VF3...
  • Page 2 Use the specified refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.
  • Page 3 <MXZ-2F33VF> <MXZ-2F33VF2> <MXZ-2F33VF3> Connectable indoor unit lineups(Heat pump inverter type) Connectable indoor unit lineups(Heat pump inverter type) Connectable indoor unit lineups(Heat pump inverter type) Capacity class [kW/h] Capacity class [kW/h] Capacity class [kW/h] Model type Model name Model type Model name Model type Model name 15 18 20 22 25 35 42 50 60 71...
  • Page 4: E1 Et1

    TECHNICAL CHANGES MXZ-2F33VF - MXZ-2F42VF - MXZ-2F53VF - MXZ-2F53VFH - MXZ-3F54VF - MXZ-3F68VF - MXZ-4F72VF - 1. New model MXZ-3F54VF - MXZ-3F54VF - MXZ-3F68VF - MXZ-3F68VF - MXZ-4F72VF - MXZ-4F72VF - 1. LEV-R has been changed. 2. Outdoor control P. C. board has been changed. MXZ-3F54VF - MXZ-3F54VF2 - MXZ-3F68VF -...
  • Page 5: Safety Precaution

    SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit. WARNING Read the OPERATION MANUAL carefully before operation. Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation. Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
  • Page 6 Use the following tools specifically designed for Make sure that the inside and outside of refrige- use with R32 refrigerant. rant piping is clean and it has no contaminants such as sulfur, oxides, dirt, shaving particles, etc, The following tools are necessary to use R32 refrigerant. which are hazard to refrigerant cycle.
  • Page 7 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
  • Page 8 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 9 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
  • Page 10 b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; • the recovery process is supervised at all times by a competent person; •...
  • Page 11 [5] Service tools Use the below service tools as exclusive tools for R32 refrigerant. Tool name Specifications Gauge manifold · Only for R32 · Use the existing fitting specifications . (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·...
  • Page 12 (2) Cautions for refrigerant piping work New refrigerant R32 is adopted for replacement inverter series. Although the refrigerant piping work for R32 is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R32 is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
  • Page 13 2-4. CHOOSING THE OUTDOOR UNIT INSTALLATION LOCATION R32 is heavier than air—as well as other refrigerants— so tends to accumulate at the base (in the vicinity of the floor). If R32 accumulates around base, it may reach a flammable concentration in case room is small. To avoid ignition, maintaining a safe work environment is required by ensuring appropriate ventilation.
  • Page 14 C) Create an appropriate ventilation open area. Make sure that the width of the open area is 0.9 [m] or more and the height of the open area is 0.15 [m] or more. However, the height from the bottom of the installation space to the bottom edge of the open area should be 0.125 [m] or less.
  • Page 15 Case 2: for floor standing Only for floor standing [kg] Amin [m²] 1.00 1.10 1.20 1.30 1.40 No requirements 1.50 1.60 1.70 1.80 1.84 3.63 h0 : Refer to indoor unit installation manual. 1.90 3.75 2.00 3.95 Floor standing 2.10 4.15 2.20 4.34...
  • Page 16: Part Names And Functions

    PART NAMES AND FUNCTIONS MXZ-2F33VF MXZ-2F33VF2 MXZ-2F33VF3 MXZ-2F42VF MXZ-2F42VF2 MXZ-2F42VF3 MXZ-2F53VF MXZ-2F53VF2 MXZ-2F53VF3 MXZ-2F53VFH MXZ-2F53VFH2 MXZ-2F53VFH3 Air inlet (Back and side) Piping Drain hose Air outlet Drain outlet MXZ-3F54VF MXZ-3F54VF2 MXZ-3F54VF3 MXZ-3F68VF MXZ-3F68VF2 MXZ-3F68VF3 MXZ-4F72VF MXZ-4F72VF2 MXZ-4F72VF3 MXZ-4F80VF2 MXZ-4F80VF3 Air inlet (Back and side) Air outlet Drain outlet...
  • Page 17: Specification

    SPECIFICATION Outdoor model MXZ-2F33VF Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 20 Connecting pipe length Max. 15 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 18 Outdoor model MXZ-2F33VF2 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 20 Connecting pipe length Max. 15 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 19 Outdoor model MXZ-2F33VF3 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 20 Connecting pipe length Max. 15 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 20 Outdoor model MXZ-2F42VF Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 30 Connecting pipe length Max. 20 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 21 Outdoor model MXZ-2F42VF2 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 30 Connecting pipe length Max. 20 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 22 Outdoor model MXZ-2F42VF3 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 30 Connecting pipe length Max. 20 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 23 Outdoor model MXZ-2F53VF MXZ-2F53VFH Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 30 Connecting pipe length Max. 20 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 24 Outdoor model MXZ-2F53VF2 MXZ-2F53VFH2 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 30 Connecting pipe length Max. 20 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 25 Outdoor model MXZ-2F53VF3 MXZ-2F53VFH3 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number Piping total length Max. 30 Connecting pipe length Max. 20 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 26: Mxz-3F54Vf- E2 Et2

    Outdoor model MXZ-3F54VF Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 3 Piping total length Max. 50 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 27: Mxz-3F54Vf2- E1 Et1

    Outdoor model MXZ-3F54VF2 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 3 Piping total length Max. 50 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 28 Outdoor model MXZ-3F54VF3 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 3 Piping total length Max. 50 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 29 Outdoor model MXZ-3F68VF Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 3 Piping total length Max. 60 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 30 Outdoor model MXZ-3F68VF2 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 3 Piping total length Max. 60 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 31 Outdoor model MXZ-3F68VF3 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 3 Piping total length Max. 60 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 32 Outdoor model MXZ-4F72VF Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 4 Piping total length Max. 60 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 33 Outdoor model MXZ-4F72VF2 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 4 Piping total length Max. 60 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 34 Outdoor model MXZ-4F72VF3 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 4 Piping total length Max. 60 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 35 Outdoor model MXZ-4F80VF2 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 4 Piping total length Max. 60 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 36 Outdoor model MXZ-4F80VF3 Single phase Outdoor unit power supply 220 - 230 - 240 V, 50 Hz Indoor units number 2 to 4 Piping total length Max. 60 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM. Height difference (Indoor ~ Indoor) Refer to 8 REFRIGERANT SYSTEM DIAGRAM.
  • Page 37: Noise Criteria Curves

    NOISE CRITERIA CURVES MXZ-2F33VF MXZ-2F42VF MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F33VF3 MXZ-2F42VF3 FAN SPEED FUNCTION SPL(dB LINE FAN SPEED FUNCTION SPL(dB LINE High Cooling High Cooling High Heating High Heating NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF NC-20 NC-20...
  • Page 38: Mxz-4F72Vf3

    MXZ-3F54VF MXZ-3F68VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-3F54VF3 MXZ-3F68VF3 FAN SPEED FUNCTION SPL(dB LINE FAN SPEED FUNCTION SPL(dB LINE High Cooling High Cooling High Heating High Heating NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF NC-20 NC-20 HEARING FOR...
  • Page 39: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 Unit: mm 1.Installation space OBH790D...
  • Page 40 MXZ-3F54VF MXZ-3F68VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-3F54VF3 MXZ-3F68VF3 Unit: mm 1.Installation space 2.Service space Note : Leave front and both sides 100 or more free of obstruction. 100 or more Service space 350 or more 350 or more Note : Leave front and overhead free of obstruction.
  • Page 41 MXZ-4F72VF MXZ-4F72VF2 MXZ-4F80VF2 MXZ-4F72VF3 MXZ-4F80VF3 Unit: mm 1.Installation space 2.Service space Note : Leave front and both sides 100 or more free of obstruction. 100 or more Service space 350 or more 350 or more Note : Leave front and overhead free of obstruction.
  • Page 42: Wiring Diagram

    WIRING DIAGRAM MXZ-2F33VF - MXZ-2F42VF - MXZ-2F53VF - OBH790D...
  • Page 43 MXZ-2F33VF2 - MXZ-2F42VF2 - MXZ-2F53VF2 - OBH790D...
  • Page 44 MXZ-2F33VF2 - MXZ-2F42VF2 - MXZ-2F53VF2 - OBH790D...
  • Page 45 MXZ-2F33VF3 - MXZ-2F42VF3 - MXZ-2F53VF3 - OBH790D...
  • Page 46 MXZ-2F33VF3 - MXZ-2F42VF3 - MXZ-2F53VF3 - OBH790D...
  • Page 47 MXZ-2F53VFH - OBH790D...
  • Page 48 MXZ-2F53VFH2 - OBH790D...
  • Page 49 MXZ-2F53VFH3 - OBH790D...
  • Page 50: E2 Et2

    MXZ-3F54VF - MXZ-3F68VF - OBH790D...
  • Page 51 MXZ-3F54VF2 - MXZ-3F68VF2 - OBH790D...
  • Page 52 MXZ-3F54VF2 - MXZ-3F68VF2 - OBH790D...
  • Page 53: Mxz-3F54Vf3

    MXZ-3F54VF3 - MXZ-3F68VF3 - OBH790D...
  • Page 54 MXZ-3F54VF3 - MXZ-3F68VF3 - OBH790D...
  • Page 55 MXZ-4F72VF - OBH790D...
  • Page 56 MXZ-4F72VF2 - MXZ-4F80VF2 - OBH790D...
  • Page 57 MXZ-4F72VF2 - MXZ-4F80VF2 - OBH790D...
  • Page 58 MXZ-4F72VF3 - MXZ-4F80VF3 - OBH790D...
  • Page 59 MXZ-4F72VF3 - MXZ-4F80VF3 - OBH790D...
  • Page 60: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MXZ-2F33VF MXZ-2F33VF2 MXZ-2F33VF3 Unit: mm Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Muffler Indoor unit 4-way valve Stop valve Sub muffler (with service port) Indoor unit Outdoor heat exchanger Stop valve temperature (with service port)
  • Page 61 MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 Unit: mm Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Muffler Indoor unit 4-way valve Stop valve Sub muffler (with service port) Indoor unit Outdoor heat Stop valve exchanger...
  • Page 62 MXZ-3F54VF MXZ-3F54VF2 MXZ-3F54VF3 Unit: mm Compressor High-pressure switch Discharge R.V. coil temperature Charge pipe Refrigerant flow in cooling thermistor RT62 Oil separator Refrigerant flow in heating 4-way Capillary tube valve Indoor unit Stop valve with service port Indoor unit Outdoor heat Muffler exchanger Indoor unit...
  • Page 63 MXZ-3F68VF MXZ-3F68VF2 MXZ-3F68VF3 Unit: mm Compressor High-pressure switch Discharge R.V. coil temperature Charge pipe Refrigerant flow in cooling thermistor RT62 Oil separator Refrigerant flow in heating 4-way Capillary tube valve Indoor unit Stop valve with service port Indoor unit Outdoor heat Muffler Indoor unit exchanger...
  • Page 64 MXZ-4F72VF MXZ-4F72VF2 MXZ-4F72VF3 Unit: mm MXZ-4F80VF2 MXZ-4F80VF3 Compressor High-pressure switch Discharge R.V. coil temperature Charge pipe Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Oil separator 4-way Indoor unit Capillary tube valve Stop valve with service port Indoor unit Indoor unit Outdoor heat Muffler...
  • Page 65 Method of Charging refrigerant ■MXZ-3F54VF/3F68VF/4F72VF Indoor unit Connection Piping Total Pre charge refrigerant number of specific I/U length 0.0 kg 1.4 kg ■MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2 Piping Total Pre charge refrigerant length 2.4 kg 2.4 kg 0.0 kg ■MXZ-2F42VF/2F53VF/2F53VFH ■MXZ-2F42VF2/2F53VF2/2F53VFH2 Piping Total Pre charge refrigerant length 1.2 kg...
  • Page 66: Performance Curves

    PERFORMANCE CURVES MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed, the following information has been pro- vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
  • Page 67 9-1. CAPACITY AND THE INPUT CURVES MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 Cooling capacity 11.1 12.8 10.2 11.6 10.5 20 25 35 40 Outdoor intake air Dry - bulb temperature (ºC) Total input (Cooling) 26 24 20 25 35 40...
  • Page 68 MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 Cooling capacity 11.1 12.8 10.2 11.6 10.5 45 46 Outdoor intake air Dry - bulb temperature ( ºC Total input (Cooling) 45 46 Outdoor intake air Dry - bulb temperature ( ºC Heating capacity 30.9...
  • Page 69 9-2. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY (single operation) MXZ-2F33VF MXZ-2F33VF2 MXZ-2F33VF3 15-class unit <HEAT>Total input <COOL>Total input <HEAT>Capacity <COOL>Capacity Frequency Frequency Frequency Frequency 18-class unit <HEAT>Capacity <HEAT>Total input <COOL>Total input <COOL>Capacity Frequency Frequency Frequency Frequency 20-class unit <HEAT>Capacity <HEAT>Total input <COOL>Total input...
  • Page 70 MXZ-2F42VF MXZ-2F42VF2 MXZ-2F42VF3 15-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 18-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 20-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 22-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 71 MXZ-2F42VF MXZ-2F42VF2 MXZ-2F42VF3 Frequency Frequency Frequency Frequency 35-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency MXZ-2F53VF MXZ-2F53VF2 MXZ-2F53VF3 MXZ-2F53VFH MXZ-2F53VFH2 MXZ-2F53VFH3 15-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 18-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity...
  • Page 72 MXZ-2F53VF MXZ-2F53VF2 MXZ-2F53VF3 MXZ-2F53VFH MXZ-2F53VFH2 MXZ-2F53VFH3 25-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 35-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 42-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 50-class unit...
  • Page 73 MXZ-3F54VF MXZ-3F54VF2 MXZ-3F54VF3 15-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 18-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 20-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 22-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 74 MXZ-3F54VF MXZ-3F54VF2 MXZ-3F54VF3 25-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 35-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 42-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 50-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 75 MXZ-3F68VF MXZ-3F68VF2 MXZ-3F68VF3 15-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 18-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 20-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 22-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 76 MXZ-3F68VF MXZ-3F68VF2 MXZ-3F68VF3 35-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 42-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 50-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 60-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 77 MXZ-4F72VF MXZ-4F72VF2 MXZ-4F72VF3 15-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 18-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 20-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 22-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 78 MXZ-4F72VF MXZ-4F72VF2 MXZ-4F72VF3 35-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 42-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 50-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 60-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 79 MXZ-4F80VF2 MXZ-4F80VF3 15-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 18-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 20-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 22-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 80 MXZ-4F80VF2 MXZ-4F80VF3 35-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 42-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 50-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity <HEAT>Capacity Frequency Frequency Frequency Frequency 60-class unit <COOL>Total input <HEAT>Total input <COOL>Capacity...
  • Page 81 9-3. HOW TO OPERATE FIXED-FREQUENCY OPERATION <Test run operation> 1. Press EMERGENCY OPERATION switch to start COOL or HEAT mode (COOL : Press once, HEAT : Press twice). 2. Test run operation starts and continues to operate for 30 minutes. 3.
  • Page 82 MXZ-2F42VF MXZ-2F42VF2 MXZ-2F42VF3 15-class unit 18-class unit (MPa[Gauge]) (MPa[Gauge]) 30Hz 30Hz 30Hz 30Hz (°C) (°C) (°C) (°C) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) 20-class unit 22-class unit...
  • Page 83 MXZ-2F53VF MXZ-2F53VF2 MXZ-2F53VF3 MXZ-2F53VFH MXZ-2F53VFH2 MXZ-2F53VFH3 15-class unit 18-class unit (MPa[Gauge]) (MPa[Gauge]) 30Hz 30Hz 30Hz 30Hz (°C) (°C) (°C) (°C) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) 20-class unit...
  • Page 84 MXZ-3F54VF MXZ-3F54VF2 MXZ-3F54VF3 15-class unit 18-class unit (MPa[Gauge]) (MPa[Gauge]) 40Hz 40Hz 40Hz 40Hz (°C) (°C) (°C) (°C) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) 20-class unit 22-class unit...
  • Page 85 MXZ-3F68VF MXZ-3F68VF2 MXZ-3F68VF3 MXZ-4F72VF MXZ-4F72VF2 MXZ-4F72VF3 15-class unit 18-class unit (MPa[Gauge]) (MPa[Gauge]) 30Hz 30Hz 30Hz 30Hz (°C) (°C) (°C) (°C) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) 22-class unit...
  • Page 86 MXZ-3F68VF MXZ-3F68VF2 MXZ-3F68VF3 MXZ-4F72VF MXZ-4F72VF2 MXZ-4F72VF3 60-class unit (MPa[Gauge]) 30Hz 30Hz Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) MXZ-4F80VF2 MXZ-4F80VF3 15-class unit 18-class unit (MPa[Gauge]) (MPa[Gauge]) 30Hz 30Hz 30Hz 30Hz (°C) (°C) (°C) (°C) Ambient temperature ( ) Ambient temperature ( )
  • Page 87 MXZ-4F80VF2 MXZ-4F80VF3 42-class unit 50-class unit (MPa[Gauge]) (MPa[Gauge]) 30Hz 30Hz 30Hz 30Hz (°C) (°C) (°C) (°C) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) 60-class unit (MPa[Gauge])
  • Page 88 MXZ-2F42VF MXZ-2F42VF2 MXZ-2F42VF3 15-class unit 18-class unit 20-class unit 22-class unit 34Hz 34Hz 34Hz 34Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) 25-class unit 35-class unit 34Hz 34Hz Ambient temperature ( ) Ambient temperature ( ) MXZ-2F53VF MXZ-2F53VF2 MXZ-2F53VF3 MXZ-2F53VFH MXZ-2F53VFH2 MXZ-2F53VFH3 15-class unit...
  • Page 89 MXZ-3F54VF MXZ-3F54VF2 MXZ-3F54VF3 18-class unit 20-class unit 15-class unit 22-class unit 48Hz 48Hz 48Hz 48Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) 35-class unit 42-class unit 25-class unit 50-class unit 48Hz 48Hz 48Hz 48Hz...
  • Page 90 MXZ-4F80VF2 MXZ-4F80VF3 18-class unit 20-class unit 15-class unit 22-class unit 36Hz 36Hz 36Hz 36Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) 25-class unit 35-class unit 42-class unit 50-class unit 36Hz 36Hz 36Hz 36Hz Ambient temperature ( )
  • Page 91: Actuator Control

    ACTUATOR CONTROL MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 Relation between main sensor and actuator Actuator Sensor Purpose Outdoor Defrost Compressor R.V. coil fan motor heater 1 Discharge temperature thermistor Protection Cooling: Coil frost prevention Indoor coil temperature thermistor Heating: High pressure protection Defrost thermistor...
  • Page 92: Service Functions

    SERVICE FUNCTIONS MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 11-1. THE POSITION OF SWITCH <MXZ-2F33VF/2F42VF/2F53VF/2F53VFH, MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2, MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3> 1 2 3 4 5 6 Outdoor display P.C. board <MXZ-3F54VF/3F68VF/4F72VF, MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2, MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3>...
  • Page 93 11-3. HOW TO SET LOW STANDBY POWER MODE MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 •A factory setting of low standby power mode for each units, MXZ-*F**VF/VF2: Activated MXZ-*F**VF3: Deactivated <MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2> In case that compressor is not in operation, and both LED1 (Red) and LED2 (Yellow) are not lit, check the setting of low standby power mode on the outdoor control P.C.
  • Page 94 <MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3> In case that compressor is not in operation, and both LED1 (Red) and LED2 (Yellow) are not lit, check the setting of low standby power mode on the outdoor control P.C. board. And check the settings for dip switch (SW1) and jumper connector (SC751). •Before turning on the breaker, settings for dip switch (SW1) and jumper connector (SC751) are necessary on the outdoor control P.C.
  • Page 95 11-5. AUTOMATIC LINE CORRECTING <MXZ-2F33VF/2F42VF/2F53VF/2F53VFH, MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2, MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3> This outdoor unit has an automatic line correcting function which automatically detects and corrects improper wiring or piping. <MXZ-2F33VF/2F42VF/2F53VF/2F53VFH, MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2, MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3> Improper wiring or piping can be automatically detected when one indoor unit is operated in COOL mode for 30 minutes. When improper wiring or piping is detected, wiring lines are corrected (A to B/ B to A) with the software.
  • Page 96 <MXZ-3F54VF/3F68VF/4F72VF, MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2, MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3> Outdoor unit has an auto line correcting function which automatically detects and corrects improper wiring or piping. Improper wiring or piping can be automatically detected by pressing the piping/wiring correction switch (SW871). When improper wiring or piping is detected, wiring lines are corrected. This will be completed in about 10 to 15 minutes.
  • Page 97: Troubleshooting

    TROUBLESHOOTING MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 12-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring.
  • Page 98 2. Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal. Check if outdoor unit is abnormal according to the following procedures. Make sure that the remote controller is set to the failure mode recall function. With the remote controller headed towards the indoor unit, press the TEMPERATURE buttons to adjust the set temperature to 25°C.
  • Page 99 NOTE: Blinking patterns of this mode differ from the ones of 3. Table of outdoor unit failure mode recall function Troubleshooting check table (12-4). MXZ-2F Upper or LED indication Indoor/ left lamp of (Outdoor P.C. board) outdoor OPERATION Abnormal point unit failure LED 1 LED 2...
  • Page 100 MXZ-2F Upper or LED indication Indoor/ left lamp of (Outdoor P.C. board) outdoor OPERATION Abnormal point unit failure LED 1 LED 2 Condition Remedy INDICATOR (Failure mode/protection) mode lamp (Indoor recall unit) function 14-time blink Refrigerant leakage The refrigerant sensor mounted on the •...
  • Page 101 NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (12-4.). MXZ-3F, 4F LED indication The left lamp of Indoor/ (Outdoor P.C. OPERATION IN- Abnormal point outdoor unit Condition Remedy board) DICATOR lamp (Failure mode/protection) failure mode (Indoor unit) recall function LED1...
  • Page 102 LED indication The left lamp of Indoor/ (Outdoor P.C. OPERATION IN- Abnormal point outdoor unit Condition Remedy board) DICATOR lamp (Failure mode/protection) failure mode (Indoor unit) recall function LED1 LED2 14-time blink Refrigerant leakage The refrigerant sensor mounted on the •...
  • Page 103 12-4. TROUBLESHOOTING CHECK TABLE MXZ-2F Indication Abnormal point / Con- Symptom Condition Remedy dition LED1(Red) LED2(Yellow) Outdoor unit The indoor unit detects an abnormality in the LEV • Refer to 12-6. "Check of LEV". Once LEV and drain pump does not op- and drain pump.
  • Page 104 Indication Abnormal point / Con- Symptom Condition Remedy dition LED1(Red) LED2(Yellow) Outdoor unit The input current exceeds 8 A (MXZ-2F33VF, operates. MXZ-2F33VF2, MXZ-2F33VF3)/ 10 A (MXZ- Primary current protec- 2F42VF, MXZ-2F42VF2, MXZ-2F42VF3, MXZ- tion 2F53VF/VFH, MXZ-2F53VF2/VFH2, MXZ- Once These symptoms do not mean any abnormality of 2F53VF3/VFH3).
  • Page 105 MXZ-3F, 4F Indication Abnormal point / Con- Symptom Condition Remedy dition LED1(Red) LED2(Yellow) Outdoor The indoor unit detects an abnormality in the LEV • Refer to 12-6. "Check of LEV". Once LEV and drain pump unit does and drain pump. •...
  • Page 106 Indication Abnormal point / Con- Symptom Condition Remedy dition LED1(Red) LED2(Yellow) 21 'Outdoor unit • Reconnect compressor connector. stops and • Refer to 12-6. "How to check inverter/ 6 times Not lit Pre-heating protection Overcurrent is detected during pre-heating. restarts compressor".
  • Page 107 12-5. TROUBLE CRITERION OF MAIN PARTS MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 Part name Check method and criterion Defrost thermistor (RT61) Measure the resistance with a tester. Fin temperature thermistor (RT64) Ambient temperature thermistor (RT65) Refer to 12-7.
  • Page 108 Part name Check method and criterion Linear expansion valve Measure the resistance with a tester. (Part temperature : -10°C - 40°C) Color of lead wire Normal WHT - RED RED - ORN 37.4 - 53.9 YLW - RED RED - BLU High pressure switch (HPS) Pressure Normal...
  • Page 109 12-6. TROUBLESHOOTING FLOW Outdoor unit does not operate. Check of power supply MXZ-2F33VF/2F42VF/2F53VF/2F53VFH MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2 MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3 Check the main power supply circuit for proper connections. Turn ON the power supply. Is there voltage of 220 - 230 - 240 V AC Check the power supply and correct them.
  • Page 110 • When the indoor unit does not operate, it cannot be operated either with the remote controller or with the EMERGENCY OPERATION switch. • When the outdoor unit does not operate, the OPERATION INDICATOR lamp on the indoor unit blinks ON and OFF every 0.5-second.
  • Page 111 MXZ-3F54VF/3F68VF/4F72VF MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2 MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3 Turn OFF the power supply. LED indication for communication status Communication status is indicated Is there rated voltage in by the LED. Check the power the power supply? supply. Unit status Blinking: normal communication Lighting: abnormal communication or not connected Turn ON the power supply.
  • Page 112 The cooling operation or heating operation does not operate. Check of R.V. coil Connector MXZ-2F MXZ-2F33VF/2F42VF/2F53VF/2F53VFH CN721 Inverter P.C. board MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2 MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3 • The heating operation does not operate. 1. Disconnect the lead wire leading to the compressor. 2. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION in HEAT mode.
  • Page 113 MXZ-3F54VF/3F68VF/4F72VF Connector MXZ-3F, 4F MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2 CNAC Outdoor control MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3 CN712 P.C. board Outdoor power • When cooling operation does not work. CNAC2 P.C. board 1. Disconnect the lead wire leading to the compressor. 2. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION in COOL mode.
  • Page 114 • When cooling, heat exchanger of non-operating indoor unit frosts. • When heating, non-operating indoor unit gets warm. Check of LEV Connector MXZ-2F MXZ-3F/4F CN724 Inverter P.C. board CN725 CN791 Outdoor control CN792 P.C. board CN793 Turn ON the power supply to the outdoor unit after checking LEV ―...
  • Page 115 • When heating, room does not get warm. • When cooling, room does not get cool. How to check inverter/compressor Disconnect the terminal of the compressor or the connector (CNMC) between the compressor and the outdoor power P.C. board. 3 minutes after the power supply is turned ON, start EMERGENCY OPERATION.
  • Page 116 • When thermistor is abnormal. Check of outdoor thermistors Disconnect the connector in the following table and Replace the thermistor except RT64. Abnormal measure the resistance of the thermistor to check If RT64 is abnormal, replace the outdoor power whether the thermistor is normal or not. (Refer to 12-7.) P.C.
  • Page 117 • Fan motor does not operate or stops operating shortly after starting the operation. Check of outdoor fan motor MXZ-2F33VF/2F42VF/2F53VF/2F53VFH Connector MXZ-2F MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2 CN931 Inverter P.C. board MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3 CN932 Disconnect CN932 and measure the resistance of the outdoor fan motor. Is the resistance of outdoor fan motor normal? (Refer to 12-5.) Turn ON the breaker.
  • Page 118 MXZ-3F54VF/3F68VF/4F72VF MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2 MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3 Connector MXZ-3F, 4F Disconnect CNF1 and measure the resistance of the outdoor fan motor. Outdoor control CNF1 P.C. board Is the resistance of outdoor fan motor Measuring points Resistance Replace the outdoor fan motor. normal? (Refer to right table.) pin1 - pin4 pin5 - pin4 60 kΩ...
  • Page 119 • When the operation frequency does not go up from the lowest frequency. Connector MXZ-3F, 4F Check of HPS Outdoor control CN63H P.C. board MXZ-3F54VF/3F68VF/4F72VF MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2 MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3 1. Disconnect the connector CN63H in the outdoor control P.C. board. 2. Check the resistance of HPS after 1 minute has passed since the outdoor unit power supply was turned OFF. Infinity Check the resistance between each terminal.
  • Page 120 Check of outdoor refrigerant circuit MXZ-2F33VF/2F42VF/2F53VF/2F53VFH MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2 MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3 The unit occasionally stops when the Was the operation started with Has the operation stopped stop valve is opened or closed during the stop valve closed, and was during pump down? operation. Open the stop valve and it opened during operation? start the cooling operation again.
  • Page 121 12-7. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board MXZ-2F33VF MXZ-2F42VF MXZ-2F53VF MXZ-2F53VFH MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2 MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3 Back side of unit R.V. coil/21S4 (CN721) Heater (CN722) MXZ-2F53VFH, MXZ-2F53VFH2, 220-230-240 V AC 280 - 370 V DC FUSE (F901) Smoothing capacitor FUSE (F801)
  • Page 122 2. Outdoor control P.C. board Defrost thermistor (RT61) MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 thermistor (RT68) MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 Serial signal 12 ~ 24 V Room B Room D 220 - 230 - 240 V AC Room A Room C Input...
  • Page 123 3. Outdoor power P.C. board MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 CN151 Signal transmission (To Outdoor control P.C. board) 15 V 5 V DC pulse wave 15 V Output to drive compressor CN171 Fin temperature thermistor CN152 (RT64) Signal Transmission...
  • Page 124: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <Detaching method of the terminal with locking mechanism> The terminal which has the locking mechanism can be detached as shown below. There are following 2 types of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
  • Page 125 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly and the inverter Photo 4 P.C. board Screws of the heat sink (1) Remove the service panel, the top panel and the cabinet Inverter support and the separator (Refer to section 1). assembly (2) Disconnect the power supply and indoor/outdoor connect- ing wire and remove the back panel (Refer to section 1).
  • Page 126 OPERATING PROCEDURE PHOTOS 5. Removing the outdoor fan motor Photo 7 (1) Remove the service panel, the top panel and the cabinet Outdoor heat (Refer to section 1). exchanger (2) Disconnect the power supply and indoor/outdoor connect- temperature ing wire. thermistor (RT68) (3) Disconnect the connectors for outdoor fan motor.
  • Page 127 13-2. MXZ-3F54VF MXZ-3F68VF MXZ-4F72VF MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2 MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3 NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet and the panels Photo 1 (1) Remove the screws of the service panel, and remove the service panel.
  • Page 128 OPERATING PROCEDURE PHOTOS Photo 4 2. Removing the outdoor control P.C. board, the out- door power P.C. board and the reactor Electrical (1) Remove the service panel (Photo 1). Catch of the electrical box assembly box assembly (2) Disconnect the power supply and indoor/outdoor con- necting wire.
  • Page 129 OPERATING PROCEDURE PHOTOS 3. Removing the fan motor Photo 8 Screws of the outdoor fan motor Sound (1) Remove the service panel (Photo 1). proof felt *1 (2) Disconnect the power supply and indoor/outdoor connect- ing wire. (3) Remove the top panel, the cabinet, and the back panel (Photo 1, 2, 3).
  • Page 130 Expansion LEV coils valves HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Issued: Nov. 2019. No.OBH790 REVISED EDITION-D Issued: May 2019. No.OBH790 REVISED EDITION-C Issued: Feb. 2019. No.OBH790 REVISED EDITION-B Issued: Sep. 2018. No.OBH790 REVISED EDITION-A Published: Mar.