Troubleshooting; Common Problems; Troubleshooting Tips - Bosch Climate 5000 MS 42 OU Owner's Manual

Troubleshooting

4 Troubleshooting
CAUTION
If one of the following conditions occurs, isolate the power supply
immediately and contact qualified personnel for further assistance.
• The operation light continues to flash rapidly after the unit has been
restarted.
• The remote control buttons do not work.
• The unit continually trips fuses or circuit breakers.
• A foreign object or water enters the air conditioner.
• Other abnormal situations.
4.1

Common Problems

The following symptoms are not a malfunction and in most situations will
not require repairs.
Problem Possible Causes
Unit does not turn The unit has a 3-minute protection feature
on when pressing
that prevents the unit from overloading.
ON/ OFF button The unit cannot be restarted within three
minutes of being turned off.
Cooling and heating models: If the operation
light and PRE-DEF (Pre-heating/ Defrost)
indicators are lit up, the outdoor tempera-
ture is too cold and the unit's anti-cold wind
is activated in order to defrost the unit.
In cooling-only models: If the "Fan Only"
indicator is lit up, the outdoor temperature is
too cold and the unit's anti-freeze protection
is activated in order to defrost the unit.
The unit changes The unit changes its setting to prevent frost
from COOL mode from forming on the unit. Once the tempera-
to FAN mode ture increases, the unit will start operating
again.
The set temperature has been reached, at
which point the unit turns off the compres-
sor. The unit will resume operation when the
temperature fluctuates again.
The indoor unit In humid regions, a large temperature
emits white mist difference between the room air and the
conditioned air can cause white mist.
Both the indoor When the unit restarts in HEAT mode after
and outdoor units defrosting, white mist may be emitted due
emit white mist to moisture generated from the defrosting
process.
The indoor unit A squeaking sound is heard when the system
makes noises is OFF or in COOL mode. The noise is also
heard when the drain pump (optional) is in
operation.
A squeaking sound may occur after running
the unit in HEAT mode due to expansion and
contraction of the unit's plastic parts.
8
Problem Possible Causes
Both the indoor A low hissing sound may occur during
unit and outdoor operation. This is normal and is caused by re-
unit make noises frigerant gas flowing through both the indoor
and outdoor units.
A low hissing sound may be heard when the
system starts, has just stopped running or
is defrosting. This noise is normal and is
caused by the refrigerant gas stopping or
changing direction.
The outdoor unit The unit will make different sounds based on
makes noises its current operating mode.
Dust is emitted The unit may accumulate dust during
from either the extended periods of non-use, which will be
indoor or the emitted when the unit is turned on. This can
outdoor unit be mitigated by covering the unit during long
periods of inactivity.
The unit emits a The unit may absorb odors from the environ-
bad odour ment (such as furniture, cooking, cigarettes,
etc.) which will be emitted during operation.
The unit's filters have become moldy and
should be cleaned.
The fan of the During operation, the fan speed is controlled
outdoor unit does to optimise product operation.
not operate
Table 2.
4.2

Troubleshooting Tips

When troubles occur, please check the following points before
contacting a repair company.
Problem Possible Causes
The unit is Power failure
not working
The power switch is off
The fuse is blown
Remote control batter-
ies are dead
The unit's 3-minute
protection has been
activated
Climate 5000 MS – 6720887258 (2018/04)
Solution
Wait for the power to
be restored
Turn on the power
Replace the fuse
Replace the remote
control batteries
Wait three minutes
after restarting the unit