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Chapter 7 : Fault Code & Descriptions
7.1
Troubleshooting
WARNING:
The following troubleshooting program may only be run by qualified service staff.
Unauthorized operation can lead to major hazards or equipment damage.
Phenomenon
Possible cause
Troubleshooting Instructions
Unable to start up
The circuit breaker of the
external electric panel is not
powered on.
The fuse installed in the
CoolDoor’s fuse holder is
failed.
The power cable of the touch
panel is experiencing
abnormality.
The touch panel has failed.
Power the circuit breaker.
Check if the power
communication cable of the TP is
normal.
Check if the single screen can be
operated normally through the
touch panel.
No air flow
The fan switch in the electric
panel is not turned on.
Fan fuse blown.
Check that the fan switch in the
electric panel is turned on.
The fan communication &
power terminal is not
connected
Check that the power supply and
communication terminals are
properly connected.
The fan fuse is blown.
Check the fan fuse.
The fan is failed
Replace the fan.
Not enough
cooling
The chiller is not supplying
chilled water as usual.
Check the chiller.
The ball valve and cut-off
valve have failed.
Check if the line is properly
connected.
Blocked or dirty coil fins.
Check whether the coil fins are
too dirty or blocked by foreign
objects.
PID parameters are set up
inappropriately.
Check whether it is the default
value.
Damaged coil fins.
Please contact the service staff.
