H3-00 - Outdoor Unit: Malfunction Of High Pressure Switch - Daikin FTXA20A Service Manual

1.5.20 H3-00 – Outdoor unit: Malfunction of high pressure switch
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
Prerequisite: Stop the unit operation via the user interface.
3 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
4 Check that the thermal interface grease is applied properly on the (PCB or
refrigerant piping) contact surface of the heat sink. Adjust if needed.
Possible cause: Thermal interface grease NOT applied properly on the heat
sink.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
High pressure switch is
activated when
compressor is off.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the high pressure switch. See
4
switch" [ 67].
Possible cause: Faulty high pressure switch.
2 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
3 Check if the power supply is conform with the regulations. See
4
circuit" [ 156].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Effect
Unit will stop operating.
"2.12 Main
1 Troubleshooting
|
Reset
Manual reset via user
interface.
"2.5 High pressure
4
PCB" [ 91].
"3.1 Electrical
Service manual
21