MovinCool Office Pro W20 Service Manual - Manual (Page 44)

Repair Section
44
(2) Unit does not operate
< NOTE >
• In this case, there is a possibility of safety device activating due to the clogged air filter. So make
sure to first clean the air filter and then start up again to confirm if the problem lies with the air filter.
• Check the installation site for operating temperature and installation space (unobstructed airflow).
• If cooling water is not supplied to the unit, a safety device is activated. Check the water flow to
confirm if the problem lies with the water flow.
Condition
Check Area Possible Cause Remedy
Unit does not operate.
Unit does
not operate.
Control
Panel
display
turns off.
1. Voltage. Power failure. Repair power.
2. Ground fault breaker trip. Ground fault or defective
ground fault breaker.
Repair ground fault section.
Reset or repair breaker.
3. LCDI power cord trip. Leakage current detected. Reset power cord.
Replace power cord.
4. Fuse. Fuse blown. Repair shorting section.
Replace fuse on the relay
board.
Control
panel
display
turns on
Control
Panel
display
shows error
codes.
1. Display code “FL”. Drain tank (optional) is filled
with the drain water.
Discharge the drain water.
RESET the controller *1 .
Loose drain switch
connection.
Reconnect the drain switch
and check the connection.
RESET the controller *1 .
Defective drain switch. Replace drain switch.
RESET the controller *1 .
2. Display code “AS”. Optional condensate pump
stops pumping water due to
any kinks and/or blockage in
the drain line or due to
improper routing of the drain
line.
Remove any blockage or
kinks from the drain line or
improve hose installation.
RESET the controller *1 .
Defective condensate pump. Replace the condensate
pump.
RESET the controller *1 .
Missing jumper connector. Insert the jumper connector
and check the connection.
RESET the controller *1 .
*1 : To RESET the controller, press ON/OFF and HI/LO buttons simultaneously for 5 seconds.