2
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
Use the specifi ed 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.
Revision A:
• MXZ-3D54VA-
E1
, MXZ-3D68VA-
E1
, MXZ-4D72VA-
E1
, MXZ-4D83VA-
E1
and MXZ-5D102VA-
E1
have been added.
Revision B:
• INDOOR UNITS COMBINATION SHEETS for MXZ-3D54VA, MXZ-3D68VA, MXZ-4D72VA, MXZ-4D83VA and MXZ-
5D102VA have been added.
• 11-4. TROUBLESHOOTING CHECK TABLE (MXZ-2D) has been modified.
Revision C:
• MXZ-4D83VA-
ER1
and MXZ-5D102VA-
ER1
have been added.
Revision D:
•
MXZ-2D40VA
-
ER2
,
MXZ-2D42VA
-
E2
,
MXZ-2D53VAH
-
E2
,
ER2
, MXZ-3D54VA2
-
E2
,
ER2
and MXZ-2D33/2D53/3D68/4
D72/4D83/5D102VA
-
E2
,
ER2
have been added.
TECHNICAL CHANGES
1
MXZ-2C30VA -
E1
MXZ-2D33VA -
E1
1. Grill has been changed.
2. Ice guard has been added.
3. Electrical parts have been changed.
4. Fan motor has been changed.
5. Indoor units combinations have been added.
6. Compressor has been changed. (KNB073FGDHC
KNB073FFDHC)
MXZ-2C40VA -
E1
MXZ-2D40VA -
E1
MXZ-2C52VA -
E1
MXZ-2D53VA -
E1
1. Grill has been changed.
2. Ice guard has been added.
3. Electrical parts have been changed.
4. Fan motor has been changed.
5. Indoor units combinations have been added.
Revision E:
• The tables of WHEN CONNECTING TO MFZ-KJ SERIES INDOOR UNIT for MXZ-2D33/2D53/3D68/4D72VA-
E2
,
ER2
,
MXZ-2D42VA-
E2
, MXZ-2D53VAH-
E2
,
ER2
and MXZ-3D54VA2-
E2
,
ER2
have been added to 7. REFRIGERANT
SYSTEM DIAGRAM.
Revision F:
•
MXZ-2D33/2D42/2D53/3D68/4D72/4D83/5D102VA
-
ET2
and MXZ-3D54VA2
-
ET2
have been added.
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