Troubleshooting
SiMT041311E
155
Service Diagnosis
Troubleshooting
Check No.15
Refer to P.185
Check No.18
Refer to P.188
Check No.20
Refer to P.189
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
YES
Turn off the power.
Check the connection.
Check the power supply voltage.
Correct the power supply.
Voltage as rated?
(R19730)
NO
NO
NO
NO
YES
YES
YES
YES
Check No. 20
Check the short circuit of the diode
bridge.
Check No.15
Check with the inverter analyser.
Turn off the power. Disconnect the
harnesses U, V, and W.
Turn on the power.
Check the electrolytic capacitor
voltage.
Electrical
components or
compressor harnesses
connected as
specified?
Replace the outdoor unit
PCB.
Replace the compressor.
Correct the power supply
or replace the outdoor unit
PCB.
Reconnect the electrical
components or compressor
harnesses as specified.
Check the following parts
and replace the defective
one(s).
∗
Outdoor unit PCB
∗
Outdoor fan motor
∗
Humidifier fan motor
∗
Four way valve coil
∗
Inverter analyser:
RSUK0917C
Normal?
NO
YES
Check No. 18
Check the discharge pressure.
Replace the stop valve.
OK?
320 ± 30 VDC?
Any LED OFF?