Mitsubishi Electric SUZ-KA24NAHZ, Руководство по обслуживанию

Страница: 35 / 122

35
OCH754A
Abnormal point and detection method Judgment and action Cause
Check Code
PL
Abnormal refrigerant circuit
During Cooling, Dry, or Auto Cooling
operation, the following conditions are
regarded as failures when detected for 1
second.
a) The compressor continues to run for 30
or more seconds.
b) The liquid pipe temperature or the
condenser/evaporator temperature is
167˚F [75˚C] or more.
These detected errors will not be
cancelled until the power source is
reset.
1
Abnormal operation of 4-way
valve
2
Disconnection of or leakage in
refrigerant pipes
3
Air into refrigerant piping
4
Abnormal operation (no rotation)
of indoor fan
· Defective fan motor.
· Defective indoor control
board.
5
Defective refrigerant circuit
(clogging)
1
When this error occurs, be sure to
replace the 4-way valve.
2
Check refrigerant pipes for disconnection or
leakage.
3
After the recovery of refrigerant, vacuum
dry the whole refrigerant circuit.
4
Refer to section "10-5. HOW TO CHECK
THE PARTS".
5
Check refrigerant circuit for operation.
To avoid entry of moisture or air into
refrigerant circuit which could cause
abnormal high pressure, purge air in
refrigerant circuit or replace refrigerant.