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7. How to overhaul the faults.
It should take approximate 3 hours to reach the lowest setting temperature of about 5
℃
(or 4
℃
) for an
empty unit (assuming ambient temp of 32 degrees centigrade and continuous operation). If not, check the
compressor, cooling fans, controller, and sensors. If all these are working normally, there is probably a cooling
pipe fault.
7.1.Check the compressor
If the wine cooler not cooling, check the current with the Amp meter
，
refer to rating label, if it too high or too
low, cut the discharge pipe
(Fig. 17 item F)
and
(Fig.12 item B)
, power on, check the current, and feel the
discharge pipe, if the obvious air pressure from compressor, if the current still very high or very low or the
discharge pipe with small air pressure, the compressor fault, replace the compressor please.
（→
6.2.3
）
Notice. After cut the discharge pipe and process pipe, in case of suck the damp, the compressor
should ne power on long time (no exceed 15 minutes is best).
7.2. Check the cooling system
When it is sure that the compressor is working normally and the cooling system
’
s fault is concentrating on the
cooling system pipe. Check following below:
1>.Cut off process pipe and check the refrigerant. If there is not enough refrigerant, the default of the refrigerant
system should be caused by the leaking. If the refrigerant is sufficient., it is probably block in the capillary.
2>.If the default is concentrated on the cooling system, the checking procedure is as below.
a.
Cut off the discharge pipe
(See Fig.17 item F)
of the compressor, and infuse 0.8-1.5 MP nitrogen per
process pipe, and put the hand close to the cut kerf. If there is a little gas leak from the terminal, it
means normal, otherwise it is jammed.
b .
Make sure the capillary is working normally. Then reconnect the discharge pipe, and infuse 0.8-1.5
MP nitrogen from process pipe, then test the leakage
, check with soap water if
the cooling system of the
soldering point is damaged. Check from the soldering point around the compressor
(Fig.17)
, if it is OK,
then check the soldering points of the evaporator
(Fig.7 )
, before check please remove the air-duct
board, please see the remove method and procedure in
(
→
6.1.2
)
c.
If all the soldering point in b is not leaking, there are two possibility, one is leakage in the inner
condenser (or anti-
dew pipe), another is the damage on the spare parts in the cooling system. If it is the
inner damage, it can not be repaired, and if the damage on the spare parts, replace them.
3>. Make sure the systems is not any leakage, refill it.
7.3.
Refill the refrigerant:
1>.
Using the vacuum pump form a vacuum in the system, via the joints of the high/low-pressure pipe, the
low-pressure pipeline is on the process pipe of the compressor
(Fig.17 showing B)
, high-pressure pipeline is
on the process pipe of the filter. Apply the vacuum pump for approximately 20 minutes. Until the vacuum is
lower than 100Pa. Then solder the process pipe of the filter. Keep the vacuum running while soldering this joint
2>.
Fill Cooling system with refrigerant via the process pipe of the compressor
(Fig.17 showing B)
.
(Regarding refrigerant quantity Please refer to the instruction at back label of wine cellar). Then solder the
