Keystone KSTAP12B Instruction Manual page 20

Faults Diagnosis
Please check the machine according to the following form before asking for maintenance:
Pr oblem
Unit does not turn
on when pressing
ON/OFF
button
Unit does not cool
well
The unit is noisy
and vibrates too
much
The unit makes a
gurgling sound
Pos sible Cause
P1 Error Code
In COOL mode: room
temperature is lower than
the set temperature
The air filter is blocked with
dust or animal hair
Exhaust hose is not
connected or is blocked
The unit is low on
refrigerant
Temperature setting is too
high
The windows and doors in
the room are open
The room area is too large
There are heat sources
inside the room
The ground is not level
The air filter is blocked with
dust or animal hair
This sound is caused by the
flow of refrigerant inside
the unit
Troubleshooting
The Water Collection Tray is full.
Turn off the unit, drain the water
from the Water Collection Tray
and restart the unit.
Reset the temperature
Turn off the unit and clean the
filter according to instructions
Turn off the unit, disconnect the
hose, check for blockage and
reconnect the hose
Call a service technician to inspect
the unit and top off refrigerant
Decrease the set temperature
Make sure all windows and doors
are closed
Double-check the cooling area
Remove the heat sources if
possible
Place the unit on a flat, level
surface
Turn off the unit and clean the
filter according to instructions
This is normal
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