Trouble Shooting - Danfoss OPTYMA Operation And Maintenance Manual

OPTYMA Control three-phase
TM

Trouble shooting

In case no alarm code is present, some of the most
common causes of anomalies are given below. These
causes may relate to internal or external problems
effecting the control.
Event Possible cause
No power supply
General magnetothermic circuit breaker
intervention.
Compressor
not starting
Auxiliary circuits magnetothermic circuit breaker
Display is OFF
intervention.
Circuit protection fuse (on the transformer)
intervention.
The control is in stand-by mode
Compressor
not starting
Pressure switches or Kriwan malfunctioning have
intervened.
No defrosting
Incorrect setting of defrosting cycle parameters
cycle occurs
© Danfoss A/S (RA Marketing/MWA), Nov. 08
RS8FE102, 080R9278
Operation and Maintenance Guide
Solution
• Check if display is ON and green light
working.
• Check the ambient probe connections.
• If the problem persists replace the probe.
• Before reinserting the magnetothermic
circuit breaker, please check that there are
no short-circuits. Then reinsert the
magnetothermic circuit breaker, checking
all the absorptions to identify any
anomalies.
• Before reinserting the magnetothermic
circuit breaker please check that no
short-circuits are present. Reinsert then
magnetothermic circuit breaker verifying all
the absorptions to identify any anomalies.
• Replace the fuse (glass fuse 10X20
F250mA 250V) .
• Check that the transformer output
absorption does not exceed 0.25A.
• Check that no other users are connected to
the clamps for Kriwan supply.
• Check that there are no short-circuits on
transformer output.
• Check that the control is not in stand by
mode (flashing green light
If it is, press the key to activate the
control (continuous light).
• Check wirings, calibration and correct
functioning of compressor and sensors.
• If starting the system for the very first
time, please check that there is a bridge
for pump-down/thermostat function
selection on X1 terminal block.
Make bridges on terminal block to
accommodate devices not present in the
system (Kriwan, pressure switches).
• Check that the parameters are set correctly.
is
).
25