13-4
TROUBLESHOOTING
SM CKDDCI 2-A.3 GB
No.
SYMPTOM /
PROBLEM
PROBABLE
CAUSE
CORRECTIVE ACTION
10
Cooling capacity is
not sufficient
Unit size not
match the load
Check if the size chosen for the complete
room(s) load is enough or need bigger units
Piping size
not matching
system
Check if piping is installed correctly and proper
diameter size and total length is according to
unit specifications
Refrigerant
leakage
Check refrigeration system (
13.3
)
Refrigerant
over-charge
Refrigerant clog
Check and repair clogging specially near the
EEV
Electronics
control problem
or protection
Check for any fault code shown on display
board and act accordingly (
13.4
)
Compressor
failure
Check if fault code #11 or 26 is shown on
display board. If so, fix the problem according to
(13.5.10)
or replace driver
Indoor coil block Clean filters and/or remove block or air by-pass
Indoor fan
malfunction
Check the motor and capacitor
(13.5.19
)
Overflow
Check if the overflow switch is ON. Replace
faulty switch or correct drain piping.
Outdoor coil
block
Remove block and/or avoid air by-pass
Outdoor fan
malfunction
Check outdoor fan motors (
13.5.9
)
Indoor fan
malfuction
Check if the overflow switch is ON. Replace
faulty switch or correct drain piping.
EEV malfunction Check EEV (
13.5.12
)
Thermistor(s)
malfunction
Check if any of fault codes #1-10 is shown
on display board. Replace faulty thermistors
(
14.1.11, 14.1.12
)
11
Heating capacity is
not sufficient
Check all according to above cooling problem (
11
)
Reverse valve
Check reversing valve operation (
13.5.11
)
Deicing not
performed
well (during
low outdoors
temperatures)
Check OCT and OAT thermistors fault codes
(#1-2 and 7-8)
Check OCT thermistor if connected well to pipe
Check OAT thermistor if connected well
Check the thermistors operation (
13.5.13
)
