MovinCool CM25 Service Manual - Manual (Page 51)

Repair Section
51
Condition Check Area
Possible Cause Remedy
Unit does
not
operate.
Self-Diagnostic
Codes
(WMC)
Buzzer
Pattern
User
Mode
Service
Mode
LCD
displays
self-
diagnostic
codes.
AL AL 1 Signal is input from the
fire alarm.
Check the fire alarm system and confirm
there is no signal input to the unit, then
RESET the controller *1 .
PU PU 3 Drain hose clogged
(for internal drain pump).
Remove any blockage or excessive kinks
preventing water flow.
Drain hose trap position
is too high to pump up
condensation water
(for internal drain pump).
Improve hose installation.
(Refer to the operation manual of this unit.)
Drain water through the gravitational drain
pipe.
RESET the controller *1 .
Internal drain pump is not
working.
Reconnect the internal drain pump and
check connection.
Drain water through the gravitational drain
pipe.
RESET the controller *1 .
If the internal drain pump still does not work,
replace it.
E07 E07 3 Drain hose is clogged (for
optional condensate
pump).
Remove any blockage or excessive kinks
preventing air flow.
RESET the controller *1 .
Drain hose trap position
is too high to pump up
condensation water (for
optional condensate
pump).
Improve hose installation.
(Refer to the installation manual of the
optional condensate pump.)
RESET the controller *1 .
Optional condensate
pump is not working.
Reconnect the drain pump and check the
connection.
RESET the controller *1 .
If the optional condensate pump still does not
work, replace it.
*1 : To RESET the controller, press RESET button, then press ON/OFF button.