Panasonic CU-E18NKUA Operating Instructions Manual page 9

TROUBLESHOOTING
The unit stops and the TIMER indicator blinks. The unit stops and the TIMER indicator blinks.
Use remote control to retrieve error code.
1
Press for 5 seconds.
3
Press for 5 seconds to
quit checking.
• For certain errors, you may restart the unit for limited operation with 4 beeps when operation starts.
Diagnostic
Abnormality/Protection control
display
H 00 No memory of failure
H 11 Indoor/outdoor abnormal communication
H 12 Indoor unit capacity unmatched
H 14 Indoor intake air temperature sensor
abnormality
H 15 Compressor temperature sensor
abnormality
H 16 Outdoor current transformer (CT)
abnormality
H 19 Indoor fan motor mechanism lock
H 23 Indoor heat exchanger temperature sensor
abnormality
H 24 Indoor heat exchanger temperature sensor
2 abnormality
H 27 Outdoor air temperature sensor
abnormality
H 28 Outdoor heat exchanger temperature
sensor 1 abnormality
H 30 Outdoor discharge pipe temperature
sensor abnormality
H 32 Outdoor heat exchanger temperature
sensor 2 abnormality
H 33 Indoor/outdoor misconnection abnormality
H 36 Outdoor gas pipe temperature sensor
abnormality
*1 For cooling only model, it is the indication when indoor heat exchanger sensor or indoor air intake sensor has abnormality.
TIMER
ON SET
3
1 2
OFF CANCEL
AC RC
SET CHECK CLOCK RESET
Diagnostic
display
2
Press until you hear beep sound, then write
down the error code.
4
Turn the unit off and reveal the error code to
authorised dealer
Abnormality/Protection control
H 37 Outdoor liquid pipe temperature sensor
abnormality
H 38 Indoor/outdoor mismatch (brand code)
H 39 Abnormal indoor operating unit or standby
units
H 64 Outdoor high pressure sensor abnormality
H 97 Outdoor fan motor mechanism lock
H 98 Indoor high pressure protection
H 99 Indoor operating unit freeze protection
F 11 4-way valve switching abnormality *1
F 17 Indoor standby units freezing abnormality
F 90 Power factor correction (PFC) circuit
protection
F 91 Refrigeration cycle abnormality
F 93 Compressor abnormal revolution
F 94 Compressor discharge pressure overshoot
protection
F 95 Outdoor cooling high pressure protection
F 96 Power transistor module overheating
protection
F 97 Compressor overheating protection
F 98 Total running current protection
F 99 Outdoor direct current (DC) peak detection
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