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Check code
Operation cause
[22]
High-pressure protective operation
1. Pd sensor error
2. Service valve close
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
YES
NO
YES
NO
YES
NO
NO
YES
NO
YES
NO
Repair SV2 bypass circuit.
(Coil error, disconnection of wiring, etc.)
Check outdoor interface P.C. board.
Defective
®
Replacement
Is the high-pressure sensor
characteristics normal?
Does cooling outdoor fan
normally operate?
Blockage of heat exchanger
Short circuit
Is there a cause to hinder
heat exchanger of outdoor unit?
Is service valve fully open?
Is SV2 bypass circuit normal?
Check parts.
Defective
®
Replacement
Open service valve fully.
Repair defective position.
Remove cause.
Refrigerant over charge
Blockage
Pipe breakage
Abnormal overload
Are the connection, capacitor,
and fan motor normal?
YES
YES
B
*
1 : In cooling only model
*
1