Daikin REYQ18U7 multiple errors on ITM

[Jayaka]

This VRF has approx 15 fan coils.
The centralised controller [ITM] was indicating a blue triangle over 1 fan coil. the breaker for this unit was found tripped or turned off by occupant. It was reset several times which may have damaged the fan coil pcb. The condensate pump was changed, this stopped the tripping but the blue triangle on the ITM kept coming back.
The fan coil pcb was changed and the old address deleted and a new one assigned via the local controller. The auto address function was used on the ITM so it could see the new pcb. System was left running ok with no faults.
A few days later and E2-01 error [Earth leakage at outdoor unit detected] as well as the blue triangle for the same fan coil and E2 errors indicated at 3 other fan coils
Both compressors are running as well as outdoor fans. These were checked for earth leakage but nothing found.
Daikin have now suggested changing the outdoor pcb board.
Any thoughts on this one?

[karinJ]

This VRF has approx 15 fan coils.
The centralised controller [ITM] was indicating a blue triangle over 1 fan coil. the breaker for this unit was found tripped or turned off by occupant. It was reset several times which may have damaged the fan coil pcb. The condensate pump was changed, this stopped the tripping but the blue triangle on the ITM kept coming back. uno online
The fan coil pcb was changed and the old address deleted and a new one assigned via the local controller. The auto address function was used on the ITM so it could see the new pcb. System was left running ok with no faults.
A few days later and E2-01 error [Earth leakage at outdoor unit detected] as well as the blue triangle for the same fan coil and E2 errors indicated at 3 other fan coils
Both compressors are running as well as outdoor fans. These were checked for earth leakage but nothing found.
Daikin have now suggested changing the outdoor pcb board.
Any thoughts on this one?

Daikin’s suggestion to change the outdoor PCB board might be a reasonable step. Faulty components on the outdoor PCB could potentially cause the E2-01 error and other issues.

[Jayaka]

I installed a new pcb and run a test. All the faults disappeared.