87
14
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[22] 1. Pd sensor error
High pressure protective operation 2. Service valve closed
3. Outdoor fan, capacitor error
4. Indoor/Outdoor PMV blockage
5. Outdoor heat exchanger blockage
6. SV2 circuit blockage
7. Communication error between indoor and
outdoor units
Is the high pressure sensor
characteristics normal?
Is service valve fully open?
Does the outdoor fan operate?
Is there a problem with the
outdoor unit heat exchanger?
(1) Blockage of heat exchanger
(2) Short circuit
Is SV2 bypass circuit normal?
Refrigerant over charge
Blockage
Pipe breakage
Abnormal overload
Remove cause.
Repair SV2 bypass circuit.
(Coil error, disconnection of
wiring etc.)
Are the connections for the
capacitor and fan motor
normal?
Check outdoor interface PC board.
If defective, replace.
Repair defective part.
Open service valve fully.
Check parts.
If defective, replace.
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
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