13-12
TROUBLESHOOTING
SM CKDDCI 2-A.3 GB
No.
Fault
Probable Cause
Corrective Action
19
Outdoor Unit
Protection
Compressor stopped
due to outdoor unit
protection
Normally no action is required
If the problem persists for more than
twice on each hour, Check for any fault
code shown on outdoor unit display board
and act accordingly (
13.4
)
Check the EEV (
13.5.12
)
Check the Outdoor fans (
13.5.9
)
Check the Indoor fans (
13.5.19
)
Check the Compressor (
13.5.10
)
Check the CTT Thermistor (
13.5.13
)
20
Indoor Coil HP
Protection
Compressor stopped
due to high pressure
(heating) protection
Normally no action is required
If the problem persists for more than
twice on each hour, check for refrigerant
leak and thermodynamic operation (
13.3
)
Check the EEV (
13.5.12
)
Check the Outdoor fans (
13.5.9
)
Check the Indoor fans (
13.5.19
)
Check the Compressor
(13.5.10
)
Check the CTT Thermistor (
13.5.13
)
21
Overflow Protection
Compressor stopped
due to water level
overflow protection
Check the drainage tube for any clog.
Correct drain piping or float switch if
needed.
It is highly recommended to install a
siphon into the unit drainage point.
24
EEPROM Not
Updated
System is using
ROM parameters
and not EEPROM
parameters
No action, unless special parameters are
required for unit operation.
25
Bad EEPROM
No action, unless special parameters are
required for unit operation.
26
Bad Communication
IDU-ODU
communication
Check communication between indoor
and outdoor units (
13.5.17
)
27
Using EEPROM
data
No problem
28
IDU model
Indoor unit model
connected is shown:
Model A - 4HP unit
No problem
29
Indoor unit model
connected is shown:
Model B - 5HP unit
30
Indoor unit model
connected is shown:
Model C - 6HP unit
31
Not applicable
