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ESIE16-03B
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Part 2. Troubleshooting
2.2. Error based troubleshooting
Page 26
22/08/16
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Version 1.1
SA R32 Sky-Air RZAG-L
2.2.1.6. “C4-00” – Heat exchanger thermistor abnormality
2.2.1.7. “C5-00” – Intermediate heat exchanger thermistor abnormality
Faulty indoor PCB.
Check if error still occurs after turning off
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is
not blinking in regular intervals.
Install correct spare part or update indoor
PCB.
Adjust wiring to indoor PCB when
required.
External factory (e.g. electrical noise)
(cause when error is reset after power
reset, and error happens again after a
while).
Check for source which could cause elec-
trical interference.
Avoid electrical interference.
Internal wiring is not OK.
Check if wiring between PCB’s is correct
(refer to wiring diagram).
Correct wiring.
Trigger
Effect
Reset
Resistance value is out of range.
T measured < -43.6°C or > 90°C.
Unit will stop operating.
Automatic reset when resistance is within
range.
Possible cause
Check
Corrective action
Faulty Heat Exchanger thermistor.
Check heat exchanger thermistor (see
"Refrigerant thermistors" on page 57
).
Replace heat exchanger thermistor when
required.
Faulty indoor PCB.
Check if error still occurs after turning off
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is
not blinking in regular intervals.
Install correct spare part or update indoor
PCB.
Adjust wiring to indoor PCB when
required.
Trigger
Effect
Reset
Resistance value is out of range.
T measured < -43.6°C or > 90°C.
Unit will stop operating.
Automatic reset when resistance is within
range.
Possible cause
Check
Corrective action
Faulty Intermediate Heat Exchanger ther-
mistor.
Check intermediate heat exchanger ther-
mistor (see
"Refrigerant thermistors" on
page 57
).
Replace intermediate heat exchanger
thermistor when required.
Faulty indoor PCB.
Check if error still occurs after turning off
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is
not blinking in regular intervals.
Install correct spare part or update indoor
PCB.
Adjust wiring to indoor PCB when
required.
Possible cause
Check
Corrective action