Self-Diagnosis Function - Heat Controller VMC09SB-1 Service Manual

7. Self-diagnosis Function

I Error Indicator
• The error indicator assists with self-diagnoisis of the air conditioner and identifies if there is any trouble.
• The error indicator location is near the ON/OFF button by the LED on the evaporator and will signal as shown in
the table below.
• If more than two errors occur simultaneously, primarily the highest severity error code is displayed.
• After error an occurrence, the error is cleared, the error LED is also cleared, simultaneously.
• To operate again on the occurrence of error code, be sure to turn off the power and then turn on.
• The error codes are different for various models
I 9, 12kBtu/h Model
Error
Error Indicator
Code
1 time 1time
1
3 sec 3 sec
2 times
2
3 sec
4 times
4
5times
5
6
7
8
9
10
Only for training and service purposes
1time 1time 1time
3 sec 3 sec
2 times
2 times 2 times
3 sec 3 sec
4 times
3 sec
3 sec
5times
3 sec
3 sec
6times
6times
3 sec
7times
7times
3 sec
8times 8times
3 sec
9times 9times
3 sec
10 times 10 times
3 sec
Cause of Error
• Indoor Temp. sensor error
- Sensor open or short
• Outdoor Temp. sensor error
- Sensor open or short
• Heat Sink sensor error
- Sensor open or short
- Heat Sink temp is over 95˚C
(203˚F)
• Communication error
• DC Peak error
• Over current error (CT2)
• Indoor fan lock error
(BLDC fan model only)
• Outdoor fan lock error
(BLDC fan model only)
• Discharge pipe thermistor is
short or open.
- 45 -
Part 4 Trouble Shooting
Indoor
Display
Operation
Indoor Outdoor
O
ON
O O ON
O O ON
O O
OFF
SHUT
O O
DOWN
SHUT
O O
DOWN
OFF
O
OFF
O O
O O
ON
(4 LED Model)