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Mitsubishi Electric MXZ-3E68VA - User Manual

Mitsubishi Electric MXZ-3E68VA
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HFC
utilized
R410A
SERVICE MANUAL
No. OBH723
REVISED EDITION-C
OUTDOOR UNIT
NOTE:
RoHS compliant products have <G> mark
on the spec name plate.
PARTS CATALOG (OBB723)
Models
MXZ-3E54VA
-
E1
,
ET1
,
ER1
MXZ-3E68VA
-
E1
,
ET1
,
ER1
MXZ-4E72VA
-
E1
,
ET1
,
ER1
MXZ-4E83VA
-
E1
,
E2
,
ET1
,
ET2
,
ER1
MXZ-5E102VA
-
E1
,
E2
,
ET1
,
ET2
,
ER1
MXZ-2E53VAHZ
-
E1
,
ER1
MXZ-4E83VAHZ
-
E1
,
ER1
Indoor unit service manual
MSZ-EF•VE Series (OBH589)
MSZ-SF•VA Series (OBH555)
MSZ-SF•VE Series (OBH600)
MSZ-FD•VA Series (OBH488)
MSZ-FH•VE Series (OBH623)
MSZ-GA•VA Series (OB378)
MSZ-GE•VA Series (OBH515)
MSZ-GF•VE Series (OBH634)
MFZ-KA•VA Series (OB409)
MFZ-KJ•VE Series (OBH666)
MLZ-KA•VA Series (OBH483)
SLZ-KA•VA Series (OC320)
SEZ-KD•VA Series (HWE07110)
PLA-RP•BA Series (OCH412)
PCA-RP•KA Series (OCH454)
PEAD-RP•JA Series (HWE08130)
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 5
4. NOISE CRITERIA CURVES ···························· 12
5. OUTLINES AND DIMENSIONS ······················ 14
6. WIRING DIAGRAM ·········································· 20
7. REFRIGERANT SYSTEM DIAGRAM ············· 36
8. PERFORMANCE CURVES ····························· 44
9. ACTUATOR CONTROL ··································· 73
10. SERVICE FUNCTIONS ···································· 74
11. TROUBLESHOOTING ····································· 77
12. DISASSEMBLY INSTRUCTIONS ···················· 97
INDOOR UNITS COMBINATION SHEETS
MXZ-4E83VA
MXZ-5E102VA
MXZ-2E53VAHZ
Please void OBH723 REVISED EDITION-B.
Revision C:
• MXZ-3E54VA-
ER1
, MXZ-3E68VA-
ER1
, MXZ-
4E72VA-
ER1
, MXZ-4E83VA-
E2
,
ET2
,
ER1
,
MXZ-5E102VA-
E2
,
ET2
,
ER1
, MXZ-2E53VAHZ-
ER1
and MXZ-4E83VAHZ-
ER1
have been added.

Other manuals for Mitsubishi Electric MXZ-3E68VA

Questions and Answers

  • C
    charlesmooreAug 8, 2025
    What to do if the problem with my Mitsubishi Electric MXZ-3E68VA keeps happening?
    • M
      michaeljohnsonAug 8, 2025
      If the issue with your Mitsubishi Electric Air Conditioner continues to happen, assess the situation and apply a fix as described in the "9-3. SELF-DIAGNOSIS ACTION TABLE".
  • C
    Craig LongAug 18, 2025
    What to do if the trouble is not reoccurring and is logged in Mitsubishi Electric MXZ-3E68VA Air Conditioner?
    • J
      Jim BoyerAug 19, 2025
      If the trouble with your Mitsubishi Electric Air Conditioner is not reoccurring but is logged, consider temporary defects such as the operation of protection devices in the refrigerant circuit including the compressor, poor wiring connections, or noise. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the trouble occurred, and matters related to wiring. After service, reset check code logs and restart the unit. Note that there may be no abnormality in the electrical components, controller board, remote controller, etc.
  • K
    Kristen GreerAug 27, 2025
    What to do if the trouble is not reoccurring and is not logged in Mitsubishi Electric MXZ-3E68VA Air Conditioner?
    • C
      Cynthia GreenAug 27, 2025
      If the trouble with your Mitsubishi Electric Air Conditioner is not reoccurring and is not logged, re-check the abnormal symptom. Conduct troubleshooting and ascertain the cause of the trouble. If the cause is not ascertained, continue to operate the unit for the time being. Note that there may be no abnormality concerning parts such as electrical components, controller board, remote controller, etc.

Summary

REFRIGERANT AND SERVICE PRECAUTIONS

Repair Service Preparation and Precautions

Essential steps and safety measures before and during air conditioner repair.

1 TECHNICAL CHANGES

3 SPECIFICATION

6 WIRING DIAGRAM

7 REFRIGERANT SYSTEM DIAGRAM

PUMPING DOWN Procedure

OUTDOOR LOW PRESSURE AND CURRENT CURVES

10 SERVICE FUNCTIONS

Key Service Functions

Explains functions like pre-heat control, operation locking, noise reduction, and auto correcting.

11 TROUBLESHOOTING

Cautions and Procedures

Provides safety warnings and general service steps for troubleshooting.

Failure Mode Recall and Check Table

Explains how to access failure modes and interpret check tables for diagnosis.

Troubleshooting Flowcharts and Parts Criteria

Guides diagnostic steps and provides part check criteria.

12 DISASSEMBLY INSTRUCTIONS

Mitsubishi Electric MXZ-3E68VA Specifications

General IconGeneral
CategoryAir Conditioner
Cooling Capacity6.8 kW
Heating Capacity8.6 kW
Power Supply220-240 V, 50 Hz
RefrigerantR410A
Energy Efficiency CoolingA++
Energy Efficiency HeatingA+
Outdoor Unit Noise Level49 dB(A)
Maximum Number of Connectable Indoor Units3
TypeMulti-Split System
Indoor Units CompatibilityM Series
Indoor Unit Dimensions (HxWxD)Varies depending on the connected indoor unit model

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