Pfannenberg Rack Serie Libro De Instrucciones página 19

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Debug Table
The information described below are useful for the service staff. The faults that require the intervention of a refrigeration engineer
must be carried out only by specialized staff. Follow all electrical legislation when working on the unit based on valid laws of the
countries were the unit is placed.
Problem
The unit does not start
No supply voltage
up
Not working thermostat
The compressor protector (KLIXON)
has switched off
It works, but does not
There is not enough gas in the
cool
equipment
Faulty thermostatic valve
Too high heat load
Problem
Switching of low
The unit works for short periods, it
pressure switch
stops and starts again after a while.
The causes are:
Switching of the high
The unit does not work.
pressure switch
The causes are:
English
Cause
Refrigerant Cycle is not working
Cause
Low gas level in the equipment
Outlet line of the compressor is
blocked and more in detail:
satured dehydrating filter,
blocked thermostatic valve.
Dirty condenser
Chiller
Possible corrective Action
Check the supply main voltage line
Inspect the connection, check and correct the parameter settings and if there
is no fault, replace the thermostat,
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
Possible corrective Action
Service by a refrigeration engineer
Clean the condenser with compressed air if it is full of dust, or use proper
solvents suitable to remove sludges.
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