Table 7—General Troubleshooting Chart
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
A/C fails to start.
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.
e. AUTO-OFF-REMOTE switch is set to Off.
Slide the 3-position switch on the Display
to REMOTE (RMOT) position.
Only indoor fan ventilator works,
although cooling or heating is desired.
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).
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).
Only indoor fan motor and compressor
working. Outdoor fan motor stopped.
a. In Heat Mode: Indoor fan motor blocked. Remove obstruction.
b. In Cool mode: System runs while
evaporator Anti-ice routine take place.
Wait up to 90 seconds until Anti-Ice routine
is completed.
In Cool mode: High pressure, or;
in Heat mode: Outdoor coil freeze
a. Run capacitor of outdoor fan
motor is burnt.
Replace outdoor fan motor run capacitor.
b. Winding of outdoor fan motor is shorted. Replace outdoor fan motor.
Only indoor fan motor and outdoor fan
motor are working. No cooling and/or
heating take place.
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.
c. Compressor winding shorted. Replace compressor.
No air supply at indoor unit
(compressor operates).
a. Indoor fan motor is blocked
or turns slowly.
1. Check voltage. Repair wiring if necessary.
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)
e. Clogged air filters. Clean filters.
Low Capacity.
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.
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.
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