Technical Changes - Mitsubishi Electric MFZ-KJ25VE-E2 Service Manual

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.
<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.
Revision A:
• MFZ-KJ50VE- has been added.
E1
Revision B:
• MFZ-KJ25VE- ,- , MFZ-KJ35VE-
E2 ER2
1

TECHNICAL CHANGES

The following models are compatible with the outdoor units with low standby power control.
Connecting these models to the MUFZ-KJ·VE(HZ) series outdoor units enables the low standby power control. Low standby
power control can reduce standby power about 90%.
Refer to the technical guide (OBT17) about the low standby power control.
With the horizontal vanes and the multi-flow vane, air blows to the expanded vertical area using only one fan.
MFZ-KJ25VE-
E1
MFZ-KJ35VE-
E1
MFZ-KJ50VE-
E1
1. New model
MFZ-KJ50VE-
ER1
1. New model
MFZ-KJ25VE-
E1
MFZ-KJ35VE-
E1
1. Indoor electronic control P.C. board has been changed.
Notes:
•
MFZ-KJ25VE- MFZ-KJ35VE-
E1
The model MFZ-KJ25VE-
•
MFZ-KJ25VE-
E2 , ER2
The model MFZ-KJ25VE-
KJ·VE(HZ) outdoor unit or the MXZ outdoor unit.
This model may be connected to the MUFZ-KJ·VE(HZ) series after once connected to the MXZ series and operated, for
example because of relocation. In that case, the MUFZ-KJ·VE(HZ) series outdoor units will not operate without taking a step.
Follow the procedure "Deleting the memorized abnormal condition" described in 10-2.1.
OBH666B
,- and MFZ-KJ50VE-
E2 ER2
MFZ-KJ25VE-
E2 ,
MFZ-KJ35VE-
E2 ,
E1
or MFZ-KJ35VE- is connected to the MUFZ-KJ·VE(HZ) outdoor unit only.
E1 E1
MFZ-KJ35VE-
E2 , ER2
, MFZ-KJ35VE-
E2 ER2 E2
,
have been added.
ER1
ER2
ER2
MFZ-KJ50VE-
E1 , ER1
or MFZ-KJ50VE-
ER2 E1
,
2
is connectable with the MUFZ-
ER1
,