ESIE17-08
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Part 2. Troubleshooting
2.2. Error based troubleshooting
Page 30
15/11/18
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Version 1.1
R32 Sky-Air RZAG-M
2.2.2.5. “E7-00” – Fan motor abnormality
2.2.2.6. “E9-00” – Electronic expansion valve abnormality
Faulty outdoor unit main PCB.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Faulty power module = faulty outdoor
inverter PCB.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Restore the power to the outdoor inverter
PCB.
Replace the outdoor inverter PCB when
required.
Refrigerant shortage.
Check for refrigerant shortage. Refer to
the nameplate for the correct charge.
Charge the correct refrigerant amount
when required.
Humidity in refrigerant (ice formation in
expansion valve).
Check for humidity in the refrigerant.
In case of suspicion of humidity, recover,
vacuum and recharge with virgin refriger-
ant.
Non condensables in refrigerant.
Check for non condensables in refriger-
ant.
In case of suspicion of non condensables,
recover, vacuum and recharge with virgin
refrigerant.
Stop valve is closed.
Check stop valve.
Open stop valve when required.
Trigger
Effect
Reset
Fan does not start in about 15~30 sec-
onds = fan motor lock.
It can occur that E7-00 error is triggered
even when the fan motor is running
caused by a faulty hall signal.
Unit will not stop operating.
Automatic reset after a continuous run.
Unit will stop operating.
Manual reset via user interface.
Possible cause
Check
Corrective action
Faulty outdoor fan motor.
Check the fan motor.
Check fan motor connections and wiring.
Replace fan motor when required.
Adjust wiring when required.
Faulty outdoor inverter PCB.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Restore the power to the outdoor inverter
PCB.
Replace the outdoor inverter PCB when
required.
Blown fuse.
Check the fuse on the outdoor unit PCB's.
Replace fuse when required.
Trigger
Effect
Reset
1. No continuity of expansion valve.
2. Minimum expansion valve opening
and suction superheat < A K and
discharge superheat < B K.
Unit will stop operating.
Manual reset via user interface.
Power reset via outdoor unit.
Possible cause
Check
Corrective action
Wet operation.
Check for wet operation. (Wet operation
can be detected by checking the suction
superheat. If the suction superheat is 0°C
then liquid refrigerant is returned to the
compressor.)
In case wet operation was detected, con-
firm the cause:
• Refrigerant
overcharge.
• Faulty expansion valve.
Possible cause
Check
Corrective action