13-11
TROUBLESHOOTING
SM CKDDCI 2-A.3 GB
No
Fault Name
5
4
3
2
1
1
RT-1 is disconnected
2
RT-1 is shorted
3
RT-2 is disconnected
1
1
4
RT-2 is shorted
1
…
Reserved
1
1
7
Communication mismatch
1
1
1
8
No Communication
1
9
No Encoder
1
1
10
Reserved
0
1
0
1
0
11
Outdoor Unit Fault
0
1
0
1
1
…
Reserved
17
Defrost protection
1
1
18
Deicing Protection
1
1
19
Outdoor Unit Protection
1
1
1
20
Indoor Coil HP Protection
1
1
21
Overflow Protection
1
1
1
…
Reserved
24
EEPROM Not Updated
1
1
25
Bad EEPROM
1
1
1
26
Bad Communication
1
1
1
27
Using EEPROM data
1
1
1
1
28
Model A
1
1
1
29
Model B
1
1
1
1
30
Model C
1
1
1
1
31
Model D
1
1
1
1
1
1 - ON, 0 - OFF
Only one code is shown. Order of priority is lower to the higher number. Diagnostics is continuously
ON as long power is on.
13.4.4
Indoor unit diagnostics and corrective actions
No.
Fault
Probable Cause
Corrective Action
1-4
Sensor failures
Sensors not
connected or
damaged
Check Thermistor (
13.5.13
)
7
Communication
mismatch
Mismatch between
IDU and ODU
models
Units are not designed to operate
together as system. Check and replace
the models installed.
8
No Communication
IDU-ODU
communication
Check communication between indoor
and outdoor units (
13.5.17
)
9
No Encoder
Indoor electronics or
motor
Check motor wiring, if ok, replace motor
If still not ok
replace Indoor electronic assembly
(
14.2.2
)
11
Outdoor Unit Fault
Outdoor controller
problem
Check for any fault code shown on
outdoor unit display board and act
accordingly (
13.4
)
17-18 Protections
Indication
No action
