Appendix A: Troubleshooting
Rev 007, 04/12 53
© SP Scientific 2012
CAUTION! ONLY QUALIFIED PERSONNEL SHOULD PERFORM MAINTENANCE ON THE
REFRIGERATION SYSTEM, AND ONLY EPA CERTIFIED TECHNICIANS SHOULD EVACUATE
OR CHARGE REFRIGERANTS.
Pump motor has overheated
The pump motor is provided with a thermal overload
protection. If it overheats, the pump will shut down; it
will restart when the motor has cooled down. This is
usually a result of the pump being overworked. Check
the above items to see if they are causing the motor to
overheat
Pump motor has burned out.
Contact SP Scientific Service for new pump motor
Refrigeration will not
start
“0/1" switch was not pressed
Press “0/1" button. Fluid pump starts first. Refrigeration
starts several seconds later .
The compressor must have adequate voltage to start.
Check voltage when power is applied to the system. If
voltage is not within +/- 5% of the system rated voltage,
contact the electrical department to have the voltage
corrected
Refrigeration cutting
out
The unit is designed for operation in an ambient
environment of 72°F/22°C. Temperatures over
80°F/27°C may cause the compressor to overheat.
Check the fan for rotation. If the fan is not rotating
check:
- AC supply to the fan.
- For blockage. - Excessive dirt/dust.
The finned condenser requires adequate airflow to
provide cooling. Make sure that the finned surface is 6"
away from the wall and not clogged with dust
Pump is making loud
noise
Blocked filter screen (on high
pressure pumps only)
Enlist a qualified technician to remove filter screen by
cutting back insulation and removing large nut on pump
housing.
Make sure that there is no ice in the fluid. Straight water
should not be used below 5°C. For lower temperature
operation mix with glycol.
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