Yuh Dak SIC-A series - Manual (Page 27)

8. Trouble Shooting
8-1
Faults The action of
the protection units The possible fault
analysis Solution
1. No power
supply display
or phase reversal
The loader
trips
A. The power supply is not
switched on.
B. The fuse wire of the control
loop is burned out.
C. The linear ordering of the
power supply is in the reverse
order.
D. The fault of the main switch
or circuit.
A. Power on after checking
B. Check the protection loop.
C. Change the wires in order
of two random power supply
wires.
D. Check or replace.
A. Over current.
B. The fault of the pump
C. The fault of the pump
over loading controller A. Reset the over loader
B. Replace after checked
and repaired
C. Replace after checked
and repaired
The high pressure
switch trips
A. The refrigerant is too much
B. The amount of blast to the
condenser is not enough
C. The sediment incrustation
of the condenser is too much
D. The dry filter is blocked up
E. The open scale of the
expansion valve is too narrow
F. The fault of the expansion
valve
F. The fault of the fan
G. The fault of the high pressure
switch
I. The condenser is beaten by
the sun shine. A. Discharge some of the refrigerant
B. Increase the amount of blast to
the condenser
C. Clean the condenser
D. Clean the dry filter
E. Adjust the open scale properly
F. Replace after checked and
repaired
G.. Replace after checked and
repaired
H. Replace after checked and
repaired
I. Prevent the condenser from
beingbeaten by the sun shine.
2. The pump
over loading
3. The compressor
over loading The loader
trips
A. Over current.
B. The fault of the compressor
C. The fault of the compressor
over loading controller A. Reset the over loader
B. Replace after checked
and repaired
C. Replace after checked
and repaired
4.The high
pressure is too
high
5. The high pressure
is too low The protection units
have no action
A. The cooling action
is not enough.
B. The vanes of the compressor
are spoiled
C. The amount of the cooling
water is too big A. Reset the temperature valve
to a new one.
B. Replace after checked and
repaired
C. Adjust the flow quantity
of the water valve
6. The low pressure
is too low The low pressure
switch trips
A. The refrigerant is not enough.
B. The dry filter is blocked up
C. The open scale of the
expansion valve is too small
D. The fault of the expansion
valve
E. The fault of the low pressure
switch A. Check the system pipe lines,
weld pipe lines, and supply
refrigerant.
B. Clean the dry filter
C. Adjust the open scale properly
D. Replace after checked and
repaired
E. Replace after checked and
repaired
The protection units
have no action