Philips WH-SDC07C3E5, Service Manual

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17.4 Error Codes Table
Diagnosis display Abnormality/Protection control Abnormality judgement Primary location to verify
H00 No abnormality detected — —
H12 Indoor/Outdoor capacity unmatched 90s after power supply 
Indoor/outdoor connection wire

Indoor/outdoor PCB

Specification and combination table in
catalogue
H15 Outdoor compressor temperature sensor
abnormality Continue for 5 sec. 
Compressor temperature sensor
(defective or disconnected)
H23 Indoor refrigerant liquid temperature
sensor abnormality Continue for 5 sec. 
Refrigerant liquid temperature sensor
(defective or disconnected)
H42 Compressor low pressure abnormality — 
Outdoor pipe temperature sensor

Clogged expansion valve or strainer

Insufficient refrigerant

Outdoor PCB

Compressor
H62 Water flow switch abnormality Continue for 1 min. 
Water flow switch
H64 Refrigerant high pressure abnormality Continue for 5 sec.

Outdoor high pressure sensor
(defective or disconnected)
H70 Back-up heater OLP abnormality Continue for 60 sec. 
Back-up heater OLP
(Disconnection or activated)
H72 Tank sensor abnormal Continue for 5 sec.

Tank sensor
H76 Indoor - control panel communication
abnormality — 
Indoor - control panel
(defective or disconnected)
H90 Indoor/outdoor abnormal communication > 1 min after starting operation 
Internal/external cable connections

Indoor/Outdoor PCB
H91 Tank heater OLP abnormality Continue for 60 sec.

Tank heater OLP
(Disconnection or activated)
H95 Indoor/Outdoor wrong connection — 
Indoor/Outdoor supply voltage
H98 Outdoor high pressure overload
protection —

Outdoor high pressure sensor

Water pump or water leakage

Clogged expansion valve or strainer

Excess refrigerant

Outdoor PCB
H99 Indoor heat exchanger freeze prevention — 
Indoor heat exchanger

Refrigerant shortage
F12 Pressure switch activate 4 times occurrence within 20
minutes 
Pressure switch
F14 Outdoor compressor abnormal revolution 4 times occurrence within 20
minutes

Outdoor compressor
F15 Outdoor fan motor lock abnormality 2 times occurrence within 30
minutes 
Outdoor PCB

Outdoor fan motor
F16 Total running current protection 3 times occurrence within 20
minutes

Excess refrigerant

Outdoor PCB
F20 Outdoor compressor overheating
protection 4 times occurrence within 30
minutes

Compressor tank temperature sensor

Clogged expansion valve or strainer

Insufficient refrigerant

Outdoor PCB

Compressor
F22 IPM (power transistor) overheating
protection 3 times occurrence within 30
minutes 
Improper heat exchange

IPM (Power transistor)
F23 Outdoor Direct Current (DC) peak
detection 7 times occurrence
continuously 
Outdoor PCB

Compressor
F24 Refrigeration cycle abnormality 2 times occurrence within 20
minutes

Insufficient refrigerant

Outdoor PCB

Compressor low compression
F25 Cooling/Heating cycle changeover
abnormality
4 times occurrence within 30
minutes 
4-way valve

V-coil
F27 Pressure switch abnormality Continue for 1 min.

Pressure switch
F36 Outdoor air temperature sensor
abnormality Continue for 5 sec. 
Outdoor air temperature sensor
(defective or disconnected)
F37 Indoor water inlet temperature sensor
abnormality Continue for 5 sec.

Water inlet temperature sensor
(defective or disconnected)
F40 Outdoor discharge pipe temperature
sensor abnormality Continue for 5 sec. 
Outdoor discharge pipe temperature
sensor (defective or disconnected)