Pfannenberg EB 210 Mode D'emploi page 91

EN
Symtoms
The unit does not
start
Unit works, but does
not cool
Fluid temperature too
low
Fluid temperature too
high
Compressor does
not start
Unit works for short
period then stops
and starts again after
a while
Operating and Maintenance Instructions - Chiller - Series EB 210 - EB 440
Troubleshooting tips
Possible cause
No supply voltage
Broken controller
Lack of refrigerant
Faulty thermostatic valve
Too much heat load or too high
ambient temperature
Controller malfunction
Not correct flow rate on hydraulic
circuit
Broken controller (contact blocked)
Wrong set-point
Broken controller
Wrong set-point
Lack of refrigerant
TD function active (set-point
temperature follows the ambient
temperature)
Too much heat load
The compressor protection (KLIXON,
where installed) has switched off:
overheating due to an inadequate
cooling of the compressor motor.
Blocked compressor due to high
temperature of the motor or high
current
Loose connections which may cause
high currents
Switching of low pressure switch:
Low gas level in the equipment
•Outlet line of the compressor is
blocked due to saturated filter or
blocked thermostatic valve
Proposed remedy
Check the supply main voltage line
Inspect the connection, verify the auxiliary
circuit fuses and, if there is no fault, replace
the controller
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
Replace the controller
Change cooling setpoint
manual)
Replace the controller
Change cooling setpoint
manual)
Please ask for the service by a refrigeration
engineer
Deactivate the TD function if not required
(Controller manual)
Possible wrong application, to be checked
with our staff
Important: After the shut-down of the
compressor, the resetting time will very
much depend 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 an internal
or external device (Klixon).
Service by a refrigeration engineer
© Pfannenberg GmbH
(Controller
(Controller
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