3.2.5 PROTECTIVE FUNCTIONS
3.2.5.1 ALARM ON WATER TANK LEVER
At any mode, when the water tank level is up to the
limit, the buzzer alarms 8 times before it stops, the
alarm lamp flashes and the machine enters into air
blowing. (At heating mode, the machine keeps
original status.) The machine restores to former
operating status after the alarms go off. After 3
minutes, if the alarms can not go off, the machine
will enter into standby automatically.
3.2.5.2 LOW TEMPERATURE PROTECTION FOR THE
EVAPORATOR
At cooling and dehumidifying modes, if the pipe
o
temperature is lower than -3 C after compressor
runs for 10 minutes, the compressor will be shut
down instantly, the fan will start at high speed and
the green LED will flash at 1 Hz. When the pipe
o
temperature goes up to 10 C, the alarm goes off
and the machine operates at set conditions.
3.2.5.3 HIGH TEMPERATURE PROTECTION
At heating mode, when the temperature at air outlet
is too high, the PTC will be turned off (without
turning off the fan); when the temperature lowers
to normal, the PTC returns to work.
At heating mode, when the temperature above the
PTC is too high, the thermal fuse will be burnt out
and the power supply to PTC will be cut off.
At heating mode, when the temperature above PTC
increases abnormally, the PTC and the fan will be
turned off; red LED1 lamp flashes rapidly. When the
temperature lowers to normal, the machine returns
to work.
THE DELAYED PROTECTION FOR COMPRESSOR
When the power is on for the first time, the
compressor starts without waiting for 3 minutes;
re-starting the machine after the compressor is
stopped needs to wait for 3 minutes.
3.2.5.5 CURRENT PROTECTION FOR COMPRESSOR
During operation, if over-current lasts for 3 seconds,
the compressor will be shut down instantly and the
green LED1 flashes. After 3 minutes, the compressor
will re-start.
3.2.6 OTHER FUNCTIONS
3.2.6.1 FAN STARTING
When the fan works at medium, low, or super low
speed, there must be 3-second high speed starting.
3.2.6.2 THE INITIAL VALUES WHEN THE POWER IS ON
When the power is on, the starting status are:
MODE: FAN
FAN: HIGH
CLOCK: 12:00
There are no other displays
3.2.6.3 BUZZER
When the machine starts up, the buzzer sounds
twice. Press any key, the buzzer sounds once. When
there is water level alarm, the buzzer sounds 8 times.
3.2.5.4
3.3 TROUBLE SHOOTING GUIDE
ROOM AIR CONDITIONER VOLTAGE LIMITS
NAME PLATE RATING
MINIMUM
MAXIMUM
115V 60Hz
98V
132V
8
Abnormal noise
Does this happen in
FAN ONLY mode?
Does this happen
without Auto Swing?
Yes
Check vertical
louver
Yes
No
Check swing
motor
Replace main
board
Check whether the
unit is on a flat, level
ground.
Remove the outdoor
discharging pipe.
Does it still happen?
Check the pipe, the
tie-in, the dis-
charger.
Yes
Check motor
capacitor
Check fan
wheel
Check fan
motor
Replace main
board
Check air in-let and
out-let both inside
and outside
Check whether some
foam or other thing
is broken into fan in
the unit.
Check loosen part
No
Check loosen part
Check whether
there is collision
happened on pipes.
Check compressor
capacitor.
Check water depth
controller switch.
Is the noise coming
from inner pipe?
Check whether pipes
are collided flat.
Yes
Replace main
board
Replace
compressor
No
It is not faulty as the
refrigerant is flowing
in the pipe.
