Alarm code
19
Activation of the protection device for the indoor unit fan motor (RCI models).
• The RUN indicator flashes and the ALARM indication is displayed on the remote control switch.
• The unit no., the alarm code and the unit code are alternatively displayed in the temperature setting section and the unit
no. and alarm code are displayed on the outdoor unit's PCB1 display.
* This alarm is indicated when the following conditions occur three times in 30 minutes:
* The indoor unit fan motor rotates less than 70 rpm for five seconds while it is operating.
Check the connectors:
PCB1: CN1, CN19, PCN1, PCN7
PCB2: CN201, CN202, PCN201, PCN202, PCN203, N (Faston)
Does the
indoor fan run?
No
Yes
Insuffcient voltage for
PCB2 (DC 280V)
Yes
Is LED1 on
PCB2 OFF?
Faulty PCB2 Replace PCB2
No
Is DC power
supply for PCB2
correctly?
Faulty PCB2 Replace PCB2
Is the voltage between Vcc 15
and GND1 of PCB2 15V ±10%?
Yes
Is LED4 on
PCB1 OFF?
Faulty PCB1 or
transformer
Replace PCB1 or
transformer
Insufficient voltage for PCB 1
No
Is DC power
supply for PCB1
correctly?
Faulty PCB1 or
transformer
Replace PCB1 or
transformer
Is the voltage between Vcc05 and
GND of PCB1 5 ±5%?
Is the voltage between Vcc12 and
GND of PCB1 12V ±10%?
Yes
Is fan motor
speed control
command to fan
motor correctly?
Faulty fan motor Replace fan motor
Remove CN201 on PCB2.
Is the voltage between CN201 #3
and GND1 more than 1V?
Yes
Is pulse signal to
PCB2 correctly?
Faulty PCB2 Replace PCB2r
Is the voltage between GND
of PCB1 and PC1 2# of PCB2
several voltage?
PCB1
PCB2
LED
PCN203
CN202
CN201
PCN7 PCN11
LED4
CN1
CN19
TB1
TB2
PC1
PC1-2#
CN201 CN202
CN201-3#
PCN202
Faulty PCB1
Replace PCB1
Yes
No
No
Yes
No
Yes
No
Transformer
8 Troubleshooting
197
SMGB0065 rev. 1 - 12/2010
8
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