Pfannenberg CCE Standart Serie Instrucciones De Operación Y Instalación página 16

The compressor protector (KLIXON,
where installed) has switched off
It works, but does not There is not enough gas in the
cool equipment
Faulty thermostatic valve
Too high heat load
Not working thermostat
Not correct flow rate on hydraulic
circuit
Problem
Switching of the high The unit does not work.
pressure switch
The causes are:
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
70040-120_01-_-(CCE_Op._Manual_EN-DE-IT-ES-FR-RU).docx
English
Refrigerant Cycle is not working
Cause
•
Dirty condenser
•
The fan is broken
•
Wrong fan rotating direction
•
Too high ambient
temperature
•
Chiller operating without
lateral panels
Compressor
Cause
Important: After the shut down of the compressor, the resetting time will
depending on the environment of the compressor: In a hot closed
environment it will be 2 hours, in ventilated 1 hour.
Note: The compressors are protected against high temperatures and
currents, with of an internal or external device (Klixon). The internal/external
device protects the compressor against the following situations:
•
overheating due to an inadequate cooling of the compressor motor.
•
Blocked compressor due to a high temperature of the motor or a high
current.
•
Loose connections which may cause high currents
Service by a refrigeration engineer
Service by a refrigeration engineer
Possible wrong application, to be checked with our staff
Check and correct the parameter settings
Verify the regulation of hydraulic bypass where installed
Verify circuit pressure drop to reach the nominal flow rate
Possible corrective Action
Clean the condenser with compressed air if it is full of dust, or use proper
solvents suitable to remove sludges.
Replace the fan
Verify the connection on the terminal board of the electrical box; Check the
right rotation of the electrical motor (only 3 phase version)
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
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