SiBE281013
Symptom-based Troubleshooting
Service Diagnosis
83
2. Symptom-based Troubleshooting
2.1
Overview
Symptom
Details of Measures
1
Equipment does not operate.
Refer to P.84
2
Indoor fan operates, but compressor does not
operate.
Refer to P.86
3
Cooling/heating operation starts but stops
immediately.
Refer to P.88
4
After unit shuts down, it cannot be restarted for a
while.
Refer to P.89
5
Equipment operates but does not provide
cooling.
Refer to P.91
6
Equipment operates but does not provide
heating.
Refer to P.93
7
Equipment discharges white mist.
Refer to P.95
8
Equipment produces loud noise or vibration.
Refer to P.96
9
Equipment discharges dust.
Refer to P.97
10
Remote controller LCD displays “
88
”.
Refer to P.98
11
Indoor swing flap does not operate.
Refer to P.99
12
Equipment emits odor.
Room smell and cigarette odors accumulated
inside the indoor unit are discharged with air.
Inside of the indoor unit must be cleaned.
13
Flap operates when power is turned on.
It is normal. The flap initializes for accurate
positioning.
14
Change of operation mode causes flap to move. It is normal. There is a control function that
moves the flap when operation mode is changed.
15
Fan operates in “M” tap during heating even if
remote controller is set to “L” tap.
It is normal. It is caused by the activation of the
overload control (airflow shift control).
16
Flap automatically moves during cooling.
It is normal. It is caused by the activation of the
dew condensation prevention function or ceiling
soiling prevention function.
17
Indoor unit fan operates in “L” tap for 1 minute in
“program dry” mode even if compressor is not
operating.
It is normal. The monitoring function forcibly
operates the fan for 1 minute.
18
Indoor unit fan operates after heating operation
stops.
It is normal. The fan operates in the “LL” tap for
60 to 100 seconds to dissipate the residual heat
in the heater.
19
Drain pump operates when equipment is not
operating.
It is normal. The drain pump continues to operate
for several minutes after equipment is turned off.
20
Horizontal swing sends air to different directions
in cooling and heating even if it is set to the same
position.
It is normal. The airflow direction in cooling/dry
operation is different from that in heating/fan
operation.
21
Flap remains horizontal even if it is set to swing
mode.
It is normal. The flap does not swing in the
thermostat OFF mode.
22
When operating in remote control thermostat, the
thermostat turns off before temperature of
remote control reaches the set temperature.
Normal operation.
The thermostat may be controlled with the
suction temperature (body thermostat),
concurrently with the set temperature.
