Product data

TROUBLESHOOTING
Table 7 – General Troubleshooting Chart (Page 1 of 2; Go to Page 2)
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
a. Power supply to unit not connected
(POWER LED Off).
Check for proper connection of power at
disconnect.
b. Fuse Blown (POWER LED Off). Reset automatic circuit breaker or replace line
fuse.
c. On/SEND has not been pressed. Press On/SEND button on Remote Control, or
use the AUTO 3-position slide switch for
automatic constant 22°C Set Point (when
Remote Control is not available).
d. Indoor unit does not receive transmitted
commands.
Make sure that nothing is blocking the Remote
Control transmission to the A/C display.
A/C fails to start.
e. AUTO-OFF-REMOTE switch is set to Off. Slide the 3-position switch on the Display to
REMOTE (RMOT) position.
a. The selected mode is on Fan Only, or on
Cool when heating is desired.
Check if the Remote Control is on the desired
mode. If not, select the correct mode (refer to
your User manual). Also note that each 15
minutes (max), the compressor will be switched
on for 3 minutes (at least).
Only indoor fan ventilator works,
although cooling or heating is
desired.
b. Temperature is set to a value which is too
high (in Cool mode.)
Observe the temperature setting on the Remote
Control. Also note that each 15 minutes (max),
the compressor will be switched on for 3
minutes (at least).
a. In Heat Mode: Indoor fan motor blocked.
Remove obstruction.
Only indoor fan motor and
compressor working. Outdoor fan
motor stopped.
b. In Cool mode: System runs while
evaporator Anti-ice routine take place.
Wait up to 90 seconds until Anti-ice routine is
completed.
a. Run capacitor of outdoor fan motor is
burnt.
Replace outdoor fan motor run capacitor.
In Cool mode: High pressure, or;
In Heat mode: Outdoor coil freeze
b. Winding of outdoor fan motor is shorted.
Replace outdoor fan motor.
a. Overload safety device on compressor is
cut out due to high temperature.
Switch Off power and try again after one hour.
b. Compressor run capacitor is burnt.
Replace compressor run capacitor.
Only indoor fan motor and outdoor
fan motor are working. No cooling
and/or heating taking place.
c. Compressor winding shorted.
Replace compressor.
1. Check voltage. Repair writing if necessary.
a. Indoor fan motor is blocked or turns
slowly.
2. Check indoor fan wheel if tight on motor
shaft. Tighten if necessary.
b. Indoor fan motor capacitor is burnt. Replace indoor fan motor capacitor.
c. Indoor fan motor winding is burnt. Replace indoor fan motor.
d. In Heat mode: Delayed start for indoor
fan motor.
Normal software delay (max. 20 sec)
No air supply at indoor unit
(compressor operates).
e. Clogged air filters. Clean filters.
a. Lack of refrigerant (will be accompanied
by whistling noise): Causes ice formation on
the evaporator coil (in Cool mode).
Unit must be charged (according to the
nameplate) after localizing the gas leak.
Low Capacity.
b. Clogged air filters. Clean filters.
In Heat mode: only compressor
runs, outdoor and indoor fan
motors are stopped. AIR CON
indicator flashes.
A/C operates in De-Icing cycle.
Wait (max.) 10 minutes until the A/C resumes
normal operation.
Note:
Check for broken wires and loose cable lugs first!
WARNING
: Always unplug the A/C before performing cleaning or maintenance activities.