Service Manual

SiUS181631EA Troubleshooting for Branch Provider (BP) Unit
Troubleshooting 223
Troubleshooting
Check No.11
Refer to P.225
YES
NO
YES
Blink
Turn the power off and then
on again.
Turn the power off and then
on again.
YES
NO
NO
Blink
Blink
Continuously ON or OFF
(R24603)
Defective indoor unit PCB or
malfunction of power supply
system.
Replace the indoor unit PCB.
Locate the cause of the
disturbance of the power supply
waveform, and correct it.
Resets normally.
Could be other causes than
malfunction (for example, noise
etc.).
Replace the connection wires
between the indoor and BP units.
Blink
Defective BP unit PCB or
malfunction of power supply
system.
Could be other causes than
malfunction (for example, noise
etc.).
Is HAP blinking?
Is HAP blinking?
YES
Normal
(Address Setting was not
conducted)
Does the
malfunction occur
again?
NO
Correct the indoor unit - BP unit
connection wires.
Is there any wiring
error?
Is the voltage 0 V?
Is there any
disturbance?
Push and hold the RESET
button on the outdoor unit
PCB for 5 seconds.
Check the indoor unit - BP
unit connection wires.
Check the HAP on the outdoor
unit.
Check the voltage of the
indoor unit - BP unit
connection wires between No.
1 and No. 2, and between No
2 and No. 3.
Check No. 11
Check power supply
waveform.
Is service
monitor on the
indoor unit PCB
blinking?
Is service
monitor on the
indoor unit PCB
blinking?
Continuously
ON or OFF
Continuously
ON or OFF
Continuously ON or OFF
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.