Yuh Dak SIC-A series - Manual (Page 28)

8-2
8. Trouble Shooting
Faults
The action of the
protection units
The possible fault analysis Solutions
The freeze protection
switch trips
A. The amount of the ice water
is too much and bring about
that the water temperature is
too low.
B. The temperature control
is set too low or has some
faults
C. The freeze protection switch
is not properly set or has some
faults
A. Check the pump and
discharge the air in the
water pipe
B. Correct the set point
or change.
C. Check, weld and repair
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The protection units
have no action
A. The cooling load is too big
B. The power of the compressor
decreases.
C. The open scale of the
expansion valve is too big
D. The packed weight of the
refrigerant is excessive.
A. Adjust the cooling load.
B. Replace after checked
and repaired
C. Adjust the open scale
of the expansion valve.
D. Discharge some of
the refrigerant.
8. The compressor
overheat The protection units
have no action
A. The heat degree of the
refrigerant in the air return
pipe is too high
B. The high pressure is
too high
C. The low pressure is too low
A. Adjust the open scale
of the expansion valve
properly
B. Check, repair and improve.
C. Check, repair and improve.
9. The chassis of
the air return pipe
and the compress
or frost over.
The protection units
have no action
A. The open scale of the
expansion valve is too big.
B. The refrigerant is too much.
C. The heat load is too small. A. Adjust the open scale
of the expansion valve
properly
B. Discharge some of the
refrigerant
C. Increase the heat load.
10 The compressor
can not start up or
trips after starting
up
The protection units
have no action
A. The power supply wire is
broken or the voltage is off
normal.
B. The temperature control
instrument is not set up properly.
C. The over loading protector
is not reset. A. Check and connect the
wires according to
Specifications.
B. Reset the temperature
control instrument.
C. Reset the over loading
protector
11 The cooling capacity
can not get up to the
standard
A. There is some air in the
cooling system.
B. The water quantity and
water supply in the cooling
system is abnormal.
C. The fans run abnormally.
D. The filter is blocked up.
E. The configure of the
cooling pump is not proper.
F. The cooling water pipe
is not configured according
to the standard
A. Discharge the air.
B. Control the water level
of the water supply tank
C. Check and repair
D. Clean the filter
E. Choose the pump up
to the mustard (flow quantity
and delivery lift)
7. The low
pressure is too high