Service Manual

5
1
TECHNICAL CHANGES
MXZ-5C42NA
MXZ-2C20NAHZ
MXZ-3C24NAHZ
MXZ-3C30NAHZ
1. New model
MXZ-3C24NA
MXZ-3C30NA
MXZ-4C36NA
1. New model
MXZ-3C24NA MXZ-3C24NA2 -
U1
MXZ-3C30NA MXZ-3C30NA2 -
U1
MXZ-4C36NA MXZ-4C36NA2 -
U1
MXZ-5C42NA MXZ-5C42NA2 -
U1
MXZ-2C20NAHZ MXZ-2C20NAHZ2 -
U1
MXZ-3C24NAHZ MXZ-3C24NAHZ2 -
U1
MXZ-3C30NAHZ MXZ-3C30NAHZ2 -
U1
1. Outdoor control P.C. board has been changed.
MXZ-2C20NA2 -
U1
1. New model
SAFETY PRECAUTION
2
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuit must be disconnected.
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
o󰀨 the power-supply breaker.
Discharge the condenser 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 electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigerating
cycle.
When the repair or the inspection of the circuit needs
to be done without turning o󰀨 the power, exercise great
caution not to touch the live parts.
When opening or closing the valve below freezing
temperatures, refrigerant may spurt out from the gap
between the valve stem and the valve body, resulting in
injuries.
OBH702H