MovinCool Office Pro W20 Service Manual - Manual (Page 40)

Repair Section
40
9.2 Self-Diagnostic Codes
• Self-diagnostic codes are displayed on the control board under the following conditions. Refer
to the troubleshooting chart on page 44 to 46 for the remedies.
LCD Display Description Condition
Drain tank is full When the drain tank is filled with drain water.
(“TANK FL” LED flashes and signal output (J106) turns on.)
Condensate pump
problem
When the (optional) condensate pump stops pumping water due to any
kink and/or blockage in the drain line or due to improper routing of the
drain line, the compressor shuts off, and LCD indicates “AS”.
(J8 input of relay board turns to open and signal output (J106) turns on.)
Defect (short or open)
of room thermistor
When room thermistor (connecting to J101) becomes short or open.
(Signal output (J106) turns on.)
Defect (short or open)
of freeze protection
thermistor
When freeze protection thermistor (connecting to J102) becomes short or
open. (Signal output (J106) turns on.)
Show running hours
of compressor
Press ON/OFF and  buttons simultaneously for 3 seconds, total
operation hours of compressor is indicated by 6-digit (hours).
Example in left: 807 hours
After 5 seconds, display goes back to normal operation mode.
TU
AM
F
SET TEMP
HI
ON
COOL
FAN
F
SET TEMP
HI
ON
COOL
FAN
F
SET TEMP
HI
ON
COOL
FAN
F
SET TEMP
HI
ON
COOL
FAN
F
SET TEMP
HI
ON
COOL
FAN