MovinCool Classic 40 Service Manual - Manual (Page 44)

Repair Section
44
6.2 Self-Diagnostic Codes
• Self-diagnostic codes are displayed on the control board under the following conditions and
clear method is as follows.
Controller Display Description Condition Reset/Remedy
Room thermistor
connection problem
When room thermistor becomes
open or shorted.
Disconnect and reconnect the
room thermistor.
If it does not work, replace room
thermistor.
Freeze protection
thermistor connection
problem
When freeze protection thermistor
becomes open or shorted.
Disconnect and reconnect the
freeze protection thermistor.
If it does not work, replace freeze
protection thermistor.
Activation of
protective device
When current of fan motor is
abnormal (higher than relay’s
current setting value).
1) See “Trouble shooting chart” on
page 47.
2) To Reset : Hold down the SET
TEMP ( /) buttons
simultaneously for 3
sec.
Loss of cooling
detection
When the room temperature minus
the freeze protection temperature is
less than 9 °F (5 °C) for 1 minute,
and this condition occurs 3 times.
1) See “Trouble shooting chart” on
page 47.
2) To Reset : Hold down the SET
TEMP ( /) buttons
simultaneously for 3
sec.
Activation of high
pressure switch
When high pressure switch is
activated 3 times in 24 hr, “HP”
blinks.
When high pressure switch is
activated 10 times in 24 hr, “HP”
turns on.
1) See “Trouble shooting chart” on
page 47.
2) To Reset : Hold down the SET
TEMP ( /) buttons
simultaneously for 3
sec.
Detection of unit stop
signal from fire alarm
system
Input fire alarm signal from fire alarm
system.
1) Check fire alarm signal off.
2) To Reset : Hold down the SET
TEMP ( /) buttons
simultaneously for 3
sec.