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