13-10
TROUBLESHOOTING
SM CKDDCI 2-A.3 GB
No
Fault Name
Fault Description
Corrective Action
28
High pressure
protection
Compressor stopped due
to high pressure protection
Normally no action is required
If the problem persists for more
than twice on each hour, check for
refrigerant clog.
Check the switch operation (
13.5.14
)
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
)
29
Low pressure
protection
Compressor stopped due
to low pressure protection
Normally no action is required
If the problem persists for more
than twice on each hour, check for
refrigerant leak.
Check the switch operation (
13.5.15
)
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
)
13.4.3
Fault Code for Indoor unit
Note:
Indoor unit diagnostics can be viewed by the outdoor unit display board
(13.4
).
The below procedure is for viewing the indoor unit codes via the indoor unit led display.
Pressing Mode button for more than 5 seconds will activate diagnostic mode by the acknowledgment
of 3 short beeps and lighting of COOL and HEAT LED’s.
When Indoor diagnostics is displayed, all four LED’s (STBY, Operate, Filter, TMR) are on.
Entering diagnostics in STBY mode allows only viewing of status (fault-display).
In diagnostic mode, system problems / information will be indicated by blinking of Heat & Cool
LED’s.
The coding method will be as follows:
Heat led will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds. Cool Led will
blink during the same 5 seconds according to the following table:
