Troubleshooting Chart - Movincool OFFICE PRO 36 Service Manual

Repair Section
32
LCD Display
TU
AM
HI F
FAN
SET TEMP
ON
COOL

7.3 Troubleshooting Chart

• To accurately troubleshoot the problem, it is important to carefully confirm the nature of the
problem. Typical problems are:
- Insufficient cooling.
- Unit does not start (operate).
- Overflow of drain water.
- Abnormal noise or vibrations.
- Others.
(1) Insufficient cooling
• Cooling system problem generally results from electrical or mechanical components such as fan
motor, compressor, control switch.
< NOTE >
• There is a possibility of insufficient cooling due to clogging of the air filter. So make sure to first
check if the air filter is clogged or not.
• Check the power supply because of the possibility of power source failure.
• Check the installation site for operating temperature and installation space (unobstructed airflow).
Description
Activation of high When high pressure switch
pressure switch (connected to J104) activates
(=J104 input turns to open) 3 times
in 24 h, "HP" is indicated and signal
output (J106) turns on.
When it activates 10 times in 24 h,
"FAIL HP" is indicated and buzzer
sounds.
Condition
Find the cause of high pressure to
address it.
Check the following.
Ambient air temperature
65 °F (18.3 °C), 50 %RH
⇔95 °F (35 °C), 60 %RH
Air filter (if dirty, wash up.)
Condenser fan motor (if not
working, replace.) Defect of high
pressure switch (if switch is open
when unit is off, replace switch.)
Reset the system.
To RESET: Press ON/OFF and
HI/LO buttons on the control box
simultaneously for 5 sec.
Reset/Remedy