Daikin FTXA20AW - H8-00 - Outdoor Unit: Malfunction of Compressor Input System; H9-00 - Outdoor Unit: Malfunction of Outdoor Air Thermistor

1 | Troubleshooting
Service manual
23
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
1.5.22 H8-00 – Outdoor unit: Malfunction of compressor input system
Trigger Effect Reset
DC voltage or current
sensor abnormality based
on the compressor
running frequency and
the input current.
Unit will NOT stop
operating.
Automatic reset when
compressor runs normally
for 60minutes.
If the error re-occurs too
soon: unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the main PCB. See "2.12Main PCB"[491].
Possible cause: Faulty main PCB.
2 Perform a check of the compressor. See "2.2Compressor"[446].
Possible cause: Faulty compressor or miswiring of the compressor power
supply cable.
3 Perform a check of the reactor. See "2.15Reactor"[4132].
Possible cause: Faulty reactor.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
1.5.23 H9-00 – Outdoor unit: Malfunction of outdoor air thermistor
Trigger Effect Reset
Outdoor air thermistor
input is out of range.
Unit will stop operating. Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the outdoor air thermistor. See "2.19Thermistors"[4144].
Possible cause: Faulty ambient air thermistor.
2 Perform a check of the main PCB. See "2.12Main PCB"[491].
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.