Service Manual

OCH636B

INDOOR UNIT

Model name Service Ref. Service manual No.

PLA-A12/18/24/30/36/42EA7 PLA-A12/18/24/30/36/42EA7

OCH640

OCB640

PCA-A24/30/36/42KA7 PCA-A24/30/36/42KA7.TH

OCH638

OCB638

PKA-A12/18HA7 PKA-A12/18HA7

OCH637

OCB637

PKA-A24/30/36KA7 PKA-A24/30/36KA7.TH

OCH639

OCB639

PEAD-A12/18/24/30/36/42AA7 PEAD-A12/18/24/30/36/42AA7 ―

PVA-A12/18/24/30/36/42AA7 PVA-A12/18/24/30/36/42AA7 ―

2 SAFETY PRECAUTION

Before obtaining access to terminal, all supply circuits 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 off 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 the 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 off 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.

2-1. ALWAYS OBSERVE FOR SAFETY

REFERENCE MANUAL