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ESIE16-03B
|
Part 2. Troubleshooting
2.2. Error based troubleshooting
22/08/16
|
Version 1.1
Page 33
SA R32 Sky-Air RZAG-L
2.2.2.9. “H4-00” – Low pressure switch abnormality
2.2.2.10. “H9-00” – Outdoor air temperature thermistor abnormality
2.2.2.11. “J3-00” – Discharge pipe thermistor abnormality
Trigger
Effect
Reset
When there is no continuity in the low
pressure switch during compressor start.
Unit will stop operating.
Automatic reset.
Possible cause
Check
Corrective action
Refrigerant shortage.
Check for refrigerant shortage. Refer to
the nameplate for the correct charge.
Charge the correct refrigerant amount
when required.
Stop valve is closed.
Check if stop valve is open.
Open stop valve when required.
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.
Adjust 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 expansion valve.
Check the expansion valve (see
"Elec-
tronic expansion valve" on page 50
).
Replace the expansion valve body (see
"Replacing expansion valve body" on
page 81
) or motor (see
"Replacing expan-
sion valve motor" on page 82
) when
required.
Faulty low pressure switch.
Check low pressure switch (see
"Low
pressure switch" on page 54
).
Replace low pressure switch (see
"Replacing low pressure switch" on
page 88
).
Trigger
Effect
Reset
Thermistor input voltage is > 4.96 V or
< 0.04 V when power is on.
Unit will stop operating.
Manual reset via user interface.
Possible cause
Check
Corrective action
Faulty outdoor air temperature thermistor.
Check outdoor temperature thermistor
(see
"Refrigerant thermistors" on
page 57
).
Replace outdoor temperature thermistor
when required.
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
).
Trigger
Effect
Reset
Thermistor input voltage is > 4.96 V or
< 0.04 V when power is on.
Unit will stop operating.
Manual reset via user interface.
Discharge pipe temperature is lower than
the heat exchanger temperature.
Possible cause
Check
Corrective action
Faulty discharge pipe thermistor.
Check discharge pipe thermistor (see
"Refrigerant thermistors" on page 57
).
Replace discharge pipe thermistor when
required.