Product Manual

SECTION 6 SHOPTEK
™
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.