![background image](http://html.mh-extra.com/html/daikin/2mks40g2v1b/2mks40g2v1b_service-manual_501075269.webp)
SiBE12-816_D
Troubleshooting for Outdoor Unit
Service Diagnosis
258
Troubleshooting
YES
(R14223)
Check indoor unit also, because a communication circuit fault
may be caused by the problem related to the indoor unit.
NO
NO
NO
NO
YES
YES
NO
YES
Wait for more than 10 seconds.
YES
To the next page
YES
NO
Check the supply voltage.
Power on again.
Check the connection on the
terminal board.
Is it damaged?
Does it have continuity?
Does it have continuity?
5 V ± 0.5 V?
Rated voltage?
Firmly connected?
Rectify the power supply.
Replace the varistor.
Replace the fuse.
Replace the outdoor unit
PCB.
Replace the thermal fuse
on the terminal board.
Reconnect it properly.
Replace the terminal board.
Replace the thermal fuse
on the terminal board.
Check the varistor (V1) on the
outdoor unit PCB.
Check the fuse (FU1) on the
outdoor unit PCB.
Check the thermal fuse on the
terminal board.
Check +5V and GND on the
outdoor unit PCB.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.