Lauda UC-140SP, Operation Manual, Page: 14 / 23

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6
Troubleshooting
DEFAULT CAUSE SOLUTION RESTART PROCEDURE
Low flow/temperature
control operates
continuously (see point
4)
Water circuit
blocked
Possible freezing
Circuit break in the
pump
Clean the water circuit,
check for closed valves
in the circuit.
Check the proportion of
ethylene glycol.
Reset the circuit
breaker of the pump. If
the problem persists
contact authorised
technical service The control will go back to
normal operation when the
problem is solved
The control thermostat
displays the following
codes:
LO
HI
E0, Er2, EE
The temperature
has been below
the setpoint for
some minutes
The temperature
has been above
the setpoint for
some minutes
Thermostat or
temperature
sensor is faulty
If the compressor is
stopped the water
temperature will rise to
normal eventually. If
the compressor is still
running contact
authorised technical
service
Check that the cold
water setpoint is within
the limits indicated on
point 3.1. If the
problem persists
contact authorised
technical service
Contact authorised
technical service
The chiller is still working
normally
The chiller is still working
normally
The chiller can be restarted
when the faulty part is
replaced
UC-140 I
NDI
GO
50/
60Hz 29.
01.
03
rev
. 0