Interruption of Operation
Page 48
Operating manual LC 340.01-A.3.5/6
Current revision status: Apr 4, 2019
8.2.7 LOW PRESSURE COMPRESSOR FAULT ALARM
Alarm indication:
Alarm lamp
“
Alarms /
Sensor failed”
is lighting red. In the page
“Events“
“Low
pressure compressor fault
”
will be indicated.
Action:
If the vaporization pressure (LP) is below 2°C there is a danger of refreezing inside the
evaporator. Therefore the control will automatically switch off the compressor if a
vaporization temperature of less than 2°C is detected for 20 seconds. Please check
following points step by step:
Failure
Reason
Corrective action
Tap water flow (laser
circuit)
a) To low tap water flow
b) No tap water flow
a) Check the water flow.
Provide at least a flow of
20 l / min
b) The compressor will
switch off approximately
15 seconds after
starting. Provide at least
a water flow of 20 l / min
Tap water temperature to
low
a) Tap water temperature
lower than 10°C
a) Check tap water
temperature inside the
tank.
Refrigerant
a) Refrigerant leak
a) See 7.5.5
Condensing pressure
a) Condensing pressure to
low
a) Air inlet temperature to
low
Expansion valve
a) Expansion valve not
working
b) Expansion valve
defective
a) Heat up the head of the
expansion valve with a
hot air blower to 40°C. If
the evaporating
pressure rises, then the
valve is good
b) If the pressure does not
rise, contact our service
department
Reset of the alarm:
Reset of this alarm will be possible as soon as the evaporating temperature reached
2°C and the input time delay of the compressor is up.
8.2.8 HIGH PRESSURE COMPRESSOR FAULT ALARM
Alarm indication:
Alarm lamp
“
Alarms /
Sensor failed”
is lighting red. In the page
“Events“
“
High
pressure compressor fault
”
will be indicated.
Action: