Pfannenberg EB 32 Betriebs- Und Wartungsanleitung Seite 17

Problem
The compressor works continuously and the chiller can't control the liquid temperature:
- too low temperature of the liquid
- too high temperature of the liquid
Too low temperature Broken thermostat (contact blocked)
Too high temperature Broken thermostat
Not enough Freon in the unit
Too high heat load
Problem
No flow rate in the circuit Pump is down
Not correct flow rate on hydraulic
circuit
70040-106_01-C_EN-DE-IT_comp.doc
English
•
Too high ambient
temperature
•
Chiller operating without
lateral panels
Compressor
Cause
Cause
Check that the chiller is located in a place that can guarantee suitable
ventilation of the refrigerating unit.
Check that the ambient temperature does not exceed the max T indicated on
the chiller label.
Mount the panels on the unit
Note: after solving the cause of the fault, start the chiller by pressing the reset
button located on the external body of the pressure switch itself (see the
picture)
Possible corrective Action
Replace the thermostat
Replace the thermostat
Please ask for the service by a refrigeration engineer
Possible wrong application, to be checked with our staff
Pump
Possible corrective Action
Check the right rotation of the electrical motor
Verify the regulation of hydraulic bypass where installed
Verify circuit pressure drop to reach the nominal flow rate
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