14
Error
Probable causes
Remedy
1
Power switch is ON,
but power lamp does not turn
on
(or goes off during operation.)
Power has not supplied. Check the power switch at the power box
(customer procurement) and wiring.
Fusion of the power
fuse.
Replace with a new fuse.
2
Power lamp is ON,
but the pump does not rotate
(or stops during operation.)
Overload protection
switch trip
※
1
•No coolant freeze-up.
1. Press the red button of the Overload
protection switch and check the power
voltage and correct.
2. If no:
Manually rotate the pump and check the
motor rotation
.
※
2
3. If no:
Clean all pipes including pump and torch
thoroughly, and replace the coolant.please
use special glycol coolant (freezing point is
10
℃
lower than the service environm ent).
4. If no:
Replace the mechanical seal or bearing (or
pump).
•Coolant freeze-up.
Use special glycol coolant (freezing point is
10
℃
lower than the environment)
• Abnormal power input
voltage
Correct input voltage
3
Pump makes an abnormal
Pump failure
Do the remedy 3) if not, then 4) of the
“Overload protection switch trip”.
4
Pump rotation is not smooth.
The coolant components
are firmly fixed inside
the pump.
5
Pump rotates,
but coolant does not circulate
(or flow rate is low).
Shortage of coolant.
Replenish coolant.
Clogged filter
Clean the filter
Clogged pipe
Clean all pipes including torch thoroughly,
and replace the coolant with a new one.
6
Leakage of upper joint of water
diversion assembly
Aging of O-ring in joint Replace O-ring
The screw is too tight
The screw can be pushed to the internal
joint, but not too tight
NEVER TOUCH the motor shaft with a hand or tool at operation
※
1.
Overload protection switch
Overload protection switch
：
If the pump is overloaded, the pump will stop and the red button of
overload protection switch will eject.Please manually solve the overload fault, and then manually press the
red button to reset, and then start the machine again.
※
2.
Use a screwdriver to assist in turning the motor shaft.
（
Note: the overload protection switch is
located at No. 36 in the figure on the next page
）
Left side panel of the unit (left) and motor inside the unit (right).
