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COMMISIONNING
After finishing assembly of conditioner, wait approx. 30 min. before starting it up (the oil must collect in the compressor to ensure
lubrication).
Unit is setted at 35° C.
This setting may be varied by turning the setting screw with a small screwdriver as indicated in the figure. To gain access to the
thermostat remove the covering panel.
In order not to compromise reliability of the unit, set point must not exceed 40° C. It is advised not to set 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.
Once covering panel has been replaced:
Usually the only thermostat is the one which controls 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 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 chiller won't start.
Nothing runs.
Only inside fan runs.
Practically no 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.
-Evaporator fan will start immediately.
-If temperature inside the control panel is higher than thermostat setting, the condenser
fan and compressor will also start.
POSSIBLE CAUSE
No mains power supply to the unit.
Control thermostat tripped or wrongly set.
Freeze stat tripped.
Condenser coil dirty.
Fault condenser fan.
Air recirculating to the condenser.
Electric panel not properly sealed.
Undersized unit.
Insufficency or total lack of refrigerant
gas.
Dirty evaporator coil.
Air recirculation due to obstacles.
the thermostat contacts are "stucked"
Cabinet not sufficiently well sealed.
Cabinet doors are open.
Holes in the 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 control panel.
Check coil and air filter.
Check fan.
Remove any obstacles.
Recalculate thermal load to be dissipated.
Check whether there are oil stains in the
compressor lodging.
Ask for a frigorist.
Check that battery is cleaned.
Remove any obstacles.
If necessary replace fault part.
Improve tightness seals.
Close the doors.
Fill in holes.
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