PDA

View Full Version : Daikin please help!


aodhan
08-01-2010, 11:34 PM
Got call out to a daikin comfort inverter model no: Rzqs125c7v1b.... Found hole on 1 of capacitors on inverter pcb... Meggered out compressor, all ok... Replaced inverter board... Restarted unit... Compressor, outdoor fans not coming on and u2 fault code appears on controller... Tried disconnecting compressor and outdoor fans but fault code still keeps coming up on controller after about 10mins from switching on controller... What should i be checking out first when i go back to site... All help greatly appreciated!
croc1774
09-01-2010, 12:04 AM
hello m8, open phase or power voltage imbalance.
check dc power to fan motors.
regards
VRVIII
09-01-2010, 12:36 AM
Got call out to a daikin comfort inverter model no: Rzqs125c7v1b.... Found hole on 1 of capacitors on inverter pcb... Meggered out compressor, all ok... Replaced inverter board... Restarted unit... Compressor, outdoor fans not coming on and u2 fault code appears on controller... Tried disconnecting compressor and outdoor fans but fault code still keeps coming up on controller after about 10mins from switching on controller... What should i be checking out first when i go back to site... All help greatly appreciated!

Hi aodhan,



I would check:

Mains voltage and neutral (220~240v)
check noise filter (A3P) for any sign damage, voltage from noise filter to main pcb (Live LB terminal with red cable / Neutral NB terminal with Blue cable) this should be 240Vac.
Noise filter fuse
check you have a resistance reading through the reactor (L1R), not open circuit.
Verify you have not mis wired or missed any pcb connections.
When unit tries to start check you have >220vdc on C+C- terminals
aodhan
09-01-2010, 12:59 AM
i have 240v onto inverter board... will check fuses and voltage on C+C-.... thanks for help!
VRVIII
09-01-2010, 01:08 AM
Hi,

Have a look at this U2 error thread.
http://www.refrigeration-engineer.com/forums/showthread.php?p=172119#post172119
aodhan
09-01-2010, 01:31 AM
can someone explain how the electrical side of a Daikin model no: RZQS125C7V1B works... ie what each of the 4 PCB are doing and the 2200uF capacitor etc... cheers