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This setting may be varied by turning the setting screw with a small screwdriver.
In order not to compromise the reliability of the unit, the setting must not exceed 40°C. It is advised not to set the
thermostat at less than 25°C to avoid dangerous vapor condensation on inside components if the door is opened, this
occurs most frequently in tropical climates.
Usually the only thermostat is the one which controls the compressor. In some cases, the units may be fitted with other thermostats:
-Freeze thermostat: a safety device which stops the compressor when frost begins to form on the evaporator coil (for
example, if the fan has broken down). It does not require setting.
-Maximum temperature thermostat in the control panel: this provides a voltage-free contact in the terminal board or an
alarm signal which indicates that the alarm level inside the control panel has been reached. It is factory set at 55°C but may be
easily set at other temperatures.
MAINTENANCE
The cooling circuit consists of an hermetically sealed system and requires no maintenance it is factory filled with expected quantity
of gas. Then a leak test is performed as well as complete function test. Fans do not require maintenance, they are mounted on ball
bearings, protected against humidity and dust, and equipped on thermal protector. Expected life is 30,000 hours. Only external fan,
according to degree of impurity which they are subjected, must be periodically cleaned with compressed air. Use of filter is
appropriate if there are impurities in the air. Warning "before beginning any maintenance, disconnect power supply."
TROUBLE-SHOOTING TABLE
PROBLEM
Air conditioner won't start.
Nothing runs.
Only inside fan runs.
Practically no electric intensity
Everything works.
Insufficient cooling.
High intensity.
Everything works.
Low intensity and compressor very hot.
Insufficient performance.
Compressor cold or even wet.
Low intensity
Compressor never stops.
During operation a lot of condensate
water forms and drained off.
-Give power to the unit using the external mains switch.
-The evaporator fan start immediately.
-If temperature inside the control panel is higher than thermostat setting, condenser fan
and compressor will also start.
POSSIBLE CAUSE
No power supply to the unit.
Control thermostat shut off or wrongly set.
Antifreeze thermostat active
Condenser coil dirty.
Fault condenser fan.
Air recirculation to the condenser.
Electric panel not properly sealed.
Undersized unit.
Insufficiency or lack of refrigerant gas.
Dirty evaporator coil.
Air recirculation due to obstacles.
Thermostat contacts are "stucked"
Cabinet not sufficiently sealed.
Cabinet doors are open.
Holes in cabinet walls.
POSSIBLE SOLUTIONS
Check circuit breakers and connections to
mains power supply line.
Check control thermostat and if
necessary lower setting.
Check inside coil, presence of any
obstacles inside the control panel, inside
temperature.
Check coil and air filter.
Check fan.
Remove any obstacles.
Recalculate thermal load to be dissipated.
Check whether there are oil stains in
compressor aera.
Consult a refrigeration specialist.
Check that battery is cleaned.
Remove any obstacles.
If necessary replace fault part.
Improve seal of the joints.
Close the doors.
Fill in holes.
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