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Cooling problem diagnosis flow_absorption minibar

No.

Possible reason

Test method and maintenance

Remark

Step 1

Power input

Check if the power supply inside the hotel room is controlled by the entry

card. The minibar needs 24 hours power input. In other cases, the bad

socket or poor contact causes the cooling failure.

Step 2

Ventilation

If the minibar is built inside wooden cabinet, then the cabinet requires good

ventilation.Check if there are enough holes both for cold air to get into and

hot air to escape. When you open the cabinet door, you feel quite warm air

temperature inside, then the ventilation might not be good enough. The air

temperature around the minibar should not be higher than 32 degree C.

Step 3

Levelling

Absorption system requires good levelling.Problem offen occurs when the

minibar is put on a carpet.Make the minibar level well. In some cases, you

can also raise the left two legs by 5mm.

Step 4

Heating element

is broken.

There is no heat rising from the back ventilation grid. Measure the

resistence of the heating element with VU meter, you should get around 700

ohms resistence reading.

power off when test

Step 5

(factory

standard is

level 4 for

thermostat)

Thermostat is

broken(mechanic

al thermostat).

There is no heat rising from the back ventilation grid.Measure the resistence

of thermostat by its two terminals with VU meter, in room temperature, it

should be ON. When it is always OFF, something is wrong with it.

power off when test

Thermostat is

broken(digital

thermostat).

There is no problem for heating element, something is wrong with it if there

is no heat rising from the back ventilation grid.

power on when test

Step 6

Cooling system

leaks

If the armonia leaks completely,then the tube over the insulation will

become very hot.Do not get scalded when you check it. Probably you will

smell the ammonia in case of leakage.

Step 7

Cooling system is

chocked.

Everything seems normal, but the unit still does not cool. You can shake the

unit left and right for a while.Let it sit normally for 3-4 hours, and then

powered on the unit, check if it can cool.

power off when test

Step 8

Cooling system is

blocked.

The capilliary tube could be also blocked by welding residue or other

impurities. You have to replace the cooling unit now.

Summary of content (1 pages)

PAGE 1
Cooling problem diagnosis flow_absorption minibar No. Possible reason Test method and maintenance Remark Power input Check if the power supply inside the hotel room is controlled by the entry card. The minibar needs 24 hours power input. In other cases, the bad socket or poor contact causes the cooling failure. Ventilation If the minibar is built inside wooden cabinet, then the cabinet requires good ventilation.Check if there are enough holes both for cold air to get into and hot air to escape.