Thermo Scientific XBF40-MD Series Installation, Operation And Service Manual page 38

Appendix
Table 2: Troubleshooting Procedures
SYMPTOM
Compressor does not run
34 Installation, Operation and Service Manual
POSSIBLE CAUSE
1. No power.
2. Low voltage.
3. Inoperative control.
4. Loose wiring at terminals.
5. Inoperative compressor contactor.
6. Open or grounded compressor windings.
7. Defective starting components.
8. Stuck / seized compressor.
TEST AND CORRECTION
1. Check power source. If none, call
qualified electrician.
2. Read supply voltage while unit is
running. Reading must equal rated
±10%.
3. Refer to the
procedure.
4. Inspect all electrical connections.
5. Start compressor
compressor analyzer.
6. Disconnect compressor leads and
read phase to phase and for any
phase to ground. If electrical checks
are OK, then, check the compressor
start gear.
7. Replace starting components.
8. Test by using
analyzer, if unsuccessful, replace
compressor.
Thermo Scientific XBF40-MD Series Blast Freezers
controller setup
using a
a compressor