E3-00 - Outdoor Unit: Actuation Of High Pressure Switch - Daikin FTXP20-71L Service Manual

2.5.7 E3-00 – Outdoor unit: Actuation of high pressure switch
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Split Comfora R32
ESIE18-01E – 2023.01
Possible cause: Faulty compressor or miswiring of the compressor power
supply cable.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
5 Wait until the rectifier voltage is below 10 V DC.
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.
6 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
opens due to measured
pressure above high
pressure switch operating
point.
High pressure control
(measured pressure just
below high pressure
switch operating point)
occurs 16 times within
300 minutes.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check that all stop valves of the refrigerant circuit are open. See
"4.2 Refrigerant circuit" [
Possible cause: Closed stop valve in the refrigerant circuit.
2 Perform a check of the high pressure switch. See
4
switch" [ 72].
Possible cause: Faulty high pressure switch.
3 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
4 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 144].
Effect
Unit will stop operating.
4
144].
"3.7 Main
2 Troubleshooting
|
Reset
Manual reset via user
interface.
"3.4 High pressure
4
PCB" [ 84].
"4.2 Refrigerant
Service manual
19