Danfoss OPTYMA - Trouble Shooting

© Danfoss A/S (RA Marketing/MWA), Nov. 08 RS8FE102, 080R9278 25
OPTYMA
TM
Control three-phase Operation and Maintenance Guide
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.
Trouble shooting
Event Possible cause Solution
Compressor
not starting
Display is OFF
No power supply
• Check if display is ON and green light is
working.
• Check the ambient probe connections.
• If the problem persists replace the probe.
General magnetothermic circuit breaker
intervention.
• 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.
Auxiliary circuits magnetothermic circuit breaker
intervention.
• 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.
Circuit protection fuse (on the transformer)
intervention.
• 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.
Compressor
not starting
The control is in stand-by mode
• 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).
Pressure switches or Kriwan malfunctioning have
intervened.
• Check wirings, calibration and correct
functioning of compressor and sensors.
• If starting the system for the very rst
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).
No defrosting
cycle occurs
Incorrect setting of defrosting cycle parameters • Check that the parameters are set correctly.