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TROUBLESHOOTING
1-34
“RUN” light flickers and “ALARM” is indicated on the remote control switch.
The unit No., alarm code and the unit code is alternately indicated on the set temperature section,
and the alarm code is indicated on the display of the outdoor unit PCB.
This alarm code is indicated when the following conditions occurs three times in 30 minutes.
* Indoor fan rotates less than 70rpm for 5 seconds during operation.
Alarm
Code
Activation of Protection Device for Indoor Fan Motor
(RCI-Model)
Faulty PCB2
Insufficient voltage for PCB2.
(DC 280V)
Does the indoor
fan run?
Is LED1 on
PCB2 OFF?
Check the connector
as shown on the right.
PCB1:
CN1, CN19, PCN1, PCN7
PCB2:
CN201, CN202, PCN201, PCN202, PCN203, N (Faston)
When the cause is checked by this flow chart,
confirm with the fan speed setting is Hi.
Yes
Replace PCB2
No
No
Faulty PCB1
Replace PCB1
Is fan motor
speed control command
to fan motor
correctly?
Faulty PCB1
or Transformer
Insufficient voltage for PCB1.
Faulty PCB1
or Transformer
Faulty
Fan Motor
Is LED4 on PCB1
OFF?
Replace PCB1
or Transformer
Replace PCB1
or Transformer
Replace
Fan Motor
No
Yes
Faulty PCB2
Is the voltage between GND
of PCB1 and PC1 2# of PCB2
several voltage?
Remove CN201 on PCB2.
Is the voltage between CN201 #3
and GND1 more than 1V?
Is pulse signal to
PCB2 correctly?
Replace PCB2
Faulty PCB2
Is DC power
supply for PCB2
correctly?
Is DC power
supply for PCB1
correctly?
No
Replace PCB2
Yes
Is the voltage between Vcc15
and GND1 of PCB2 15V+10%?
Is the voltage between Vcc05
and GND of PCB1 5V+5%?
Is the voltage between Vcc12
and GND of PCB1 12V+10%?
Yes
No
Yes
No
Yes
No
PCB1
PCB2
Electrical
Box
LED
PCN203
CN202
CN201
Transformer
PCN7 PCN11
LED4
CN1
CN19
TB1
TB2
PC1
PC1-2#
CN201
CN202
CN201-3#
PCN202
Содержание Utopia PAS-3HVRG
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