SECTION 6
S
HOP
T
EK
™
USER MANUAL
67
02250180-090 R00
Table 6-3: Troubleshooting Guide
SYMPTOM
PROBABLE CAUSE
REMEDY
Compressor will not start
Main disconnect switch open
Close switch.
Line fuse blown
Replace fuse.
Motor starter overload tripped
Reset - if fault persists, check motor
contacts for proper function.
Low incoming line voltage
Check voltage - in the case of low voltage,
check power source, or contact local power
company.
Compressor shuts down
under service load conditions
Loss of control voltage
Check 110V AC power supply.
Low incoming line voltage
Check voltage - in the case of low voltage,
check power source, or contact local power
company.
High operating pressure
Reset - if fault persists, check line pressure
and ensure that it does not exceed the
compressor’s maximum operating
pressure.
Compressor shuts down
under service load conditions
- High Pressure Fault
Compressor pressure setting
incorrect
Change setting in Controller.
Control line strainer clogged
Clean or replace strainer.
Minimum pressure valve
malfunction
Repair or replace minimum pressure valve.
Control line air leak
Repair leak
Defective unload solenoid valve
Check valve – if it does not operate when
energized, replace the valve coil or the
entire valve if defective.
Compressor shuts down
under service load conditions
- High Temperature Fault
Cooling air flow restricted
Clean cooler and check for proper
ventilation.
Ambient temperature too high
Check ventilation and increase if too low.
Low fluid level
Add fluid.
Clogged fluid filter
Change the fluid filter element.
Thermal valve malfunction
Replace thermal valve element.
Temperature sensor RTD
malfunction
Check connection and sensor – replace if
sensor is defective.
Cooling fan rotational direction is
reversed.
Reconnect fan motor cables for proper
rotational direction.
Summary of Contents for ShopTek ST1100
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