MovinCool Office Pro W20 Service Manual - Manual (Page 45)

Repair Section
45
Control
panel
display
turns on
Control
Panel
display
shows error
codes.
3. Display code “RT”. Loose room thermistor
connection.
Reconnect the room
thermistor and check the
connection.
RESET the controller *1 .
Defective room thermistor
(short or open).
Replace room thermistor.
4. Display code “FT”. Loose freeze protection
thermistor connection.
Reconnect the freeze
protection thermistor and
check the connection.
RESET the controller *1 .
Defective freeze protection
thermistor (short or open).
Replace freeze protection
thermistor.
5. Display code “HP” and
“FAIL HP”.
Operating outside of the
operating temperature
range.
Check environmental
condition. Do not use the unit
outside the operating
condition range.
(See page 9.)
RESET the controller *1 .
Insufficient water flow. Connect water inlet of the unit
and water supply line
correctly.
RESET the controller *1 .
Adjust flow of the supplied
water source. (See page 52).
RESET the controller *1 .
Clean water system to
remove accumulated
sediment.
(See page 52 and 53.)
RESET the controller *1 .
Loose high-pressure switch
connection.
Reconnect the high-pressure
switch and check the
connection.
Defective high-pressure
switch (short or open).
Replace high-pressure
switch.
Refrigerant is over charged. Charge correct amount of
refrigerant. (See page 74.)
RESET the controller *1 .
Condition
Check Area Possible Cause Remedy
Unit does not operate.
*1 : To RESET the controller, press ON/OFF and HI/LO buttons simultaneously for 5 seconds.