ESIE16-03B
|
Part 2. Troubleshooting
2.2. Error based troubleshooting
22/08/16
|
Version 1.1
Page 41
SA R32 Sky-Air RZAG-L
2.2.3.3. “U2-00” – Power supply abnormality or instantaneous power failure
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Adjust power supply when required.
Power reset via outdoor unit.
Faulty capacity adapter on outdoor PCB.
Check if the correct adapter is installed.
Check if the correct spare part is installed.
Adjust capacity adapter when required.
Trigger
Effect
Reset
There is no zero-cross detected in
approximately 10 seconds (indoor unit
PCB).
Unit will stop operating.
Power reset via outdoor unit.
Abnormal voltage drop (< 150-180 V) is
detected by the DC voltage detection cir-
cuit.
Unit will stop operating.
Automatic restart after compressor
stand-by of 3 minutes.
Abnormal voltage rise is detected by the
over-voltage detection circuit.
Unit will stop operating.
Automatic restart after compressor
stand-by of 3 minutes.
Possible cause
Check
Corrective action
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Adjust power supply when required.
Power reset via outdoor unit.
Defective DC voltage detection circuit.
Check PCB with DC voltage detection cir-
cuit.
Replace PCB when required.
Defective over-voltage detection circuit.
Check PCB with over-voltage detection
circuit.
Replace PCB when required.
Defective PAM control part.
Check PAM control part.
Replace PAM control part when required.
Faulty compressor.
Check compressor (see
"Compressor" on
page 49
).
Check connections and wiring of the com-
pressor.
Check expansion valve (liquid back issue)
(see
"Electronic expansion valve" on
page 50
).
Check the refrigerant charge. Refer to the
nameplate for correct charge.
Replace compressor when required (see
"Replacing compressor" on page 76
).
Investigate reason of breakdown.
Replace expansion valve when required
(see
"Replacing expansion valve body" on
page 81
).
Fix possible leak.
Faulty outdoor fan motor.
Check the fan motor (see
"Fan motor" on
page 52
).
Check fan motor connections and wiring.
Replace fan motor when required (see
"Replacing DC fan motor assembly" on
page 79
).
Adjust wiring when required.
Momentary drop of voltage.
-
Wait until compressor restarts.
Momentary power failure.
-
Wait until compressor restarts.
Faulty outdoor unit main PCB.
Check if the HAP LED is blinking in regu-
lar intervals (see
"Main PCB" on page 55
).
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
(see
"Replacing main PCB" on page 89
).
Faulty indoor unit main PCB.
Check if the HAP LED is blinking in regu-
lar intervals (see
"Main PCB" on page 55
).
Check if the correct spare part is installed.
Check if the indoor main PCB receives
power.
Restore the power to the indoor main
PCB.
Replace indoor main PCB when HAP LED
is not blinking in regular intervals (see
"Replacing main PCB" on page 89
).
Possible cause
Check
Corrective action
