Troubleshooting Guide - Panasonic OCU-R200SF Service Manual

Outdoor condensing unit

Table of Contents

When the unit fails to work or has a problem, please ask the specialized agency to repair.

For some reasons, if the condensing unit or refrigerant circuit part fails to work, turn off the power before repairing.

In order to avoid repeated failures, please pay attention to the following points

(1)In order not to repeat the same failure, ensure to carry out the failure diagnosis and identify the broken part

and its cause before repairing

(2) When repairing the pipes, make sure to recover the refrigerant and braze the repair part while running the

nitrogen gas through the pipe.

(3) When replacing the major parts of compressor or condenser, or when replacing refrigerant or oil, please

make sure to replace the filter dryer. If the inside of the refrigerant pipe is very dirty due to, for example,

compressor motor burning, please blow nitrogen gas through the pipe in order to remove the remaining oil

in the refrigerant circuit. (Please remove expansion valve at this time.)

(4) When repairing/replacing/disposing the condensing unit, please make sure to recover all the refrigerant.

(5) For parts' failure, please just replace the broken parts, instead of the replacement of the entire unit.

(6) The broken part should be replaced with the same model that is written on the part. When the parts number

is unknown, please consult with us. When replacing a fuse, please make sure to use the designated

fuse with silica sand. (The other fuse may explode at the time of fusing.)

(7) In order to prevent the earth leakage accidents, please make sure to put all parts that are removed during the

check service (e.g. cover, electrical part, etc.) back to their original places.

(8) Prevention of idle heating of crankcase heater:

When replacing compressor, please make sure to turn off power so that the electricity will not run through the

crankcase heater while the crankcase heater is detached from the compressor (prevention of fire).

(9) After repair, make sure to test the operating condition, just like test operation. Particularly, check if the

failure will not occur again.

* For the failures which the causes are not clear, please record the failure appearance, model number,

and manufacturing number, then contact with after sales engineers.

The following table shows the abnomal status of unit

Items

Discharge Temp.

Abnormal

Over-current Alarm

Anti-phase Protection

High Discharge

Pressure Alarm

Discharge Sensor

Alarm

Condensing Sensor

Alarm

Compressor Motor

Fault

In case of failure alarm, please check the cause of the alarm and consult relevant professionals for troubleshooting if necessary.