42
Parameter Fault list - checking and removing all faults in the fault list
Fault description:
The fault will be written to the fault list and the system will be
permanently shut down after the system has been shut down five times
within the operating time (5 minutes). Generally, the shutdown via
the HP sensor max. is a controlled shutdown that is only displayed for
information and for the duration of the idle time, i.e. it is not entered
into the fault list. Only frequent shutdowns over a short period of time
point towards a fault and are therefore entered into the fault list.
The system will be permanently shut down after the fault has occurred
five times within the operating time (idle time x 50 plus 20 minutes).
The fault will be written to the fault list after it has occurred for the first
time.
Each time the compressor is switched OFF, the system checks after 10
seconds, whether the relay K9 is open. A contactor is stuck, if that is the
case. The fault is written to the fault list, and the system is permanently
shut down.
After the compressor has started, and after a delay of 15 seconds,
masking checks, whether the relay K9 is open. An HP limit switch has
responded, if that is the case. The fault is written to the fault list, and the
system is permanently shut down.
After the compressor has started, the pressure must have risen by 2 bar
within 10 seconds. A fault has occurred, if that is not the case, and the
fault will be written into the fault list, if that is its first occurrence. The
system is then permanently shut down.
The defined minimum source temperature was not reached. The fault is
written to the fault list.
The compressor starts again after the selected idle time has expired.
The compressor will be stopped for the minimum idle time if a hot gas
temperature of 130 °C is exceeded. This is a normal controlled shutdown
that is not entered into the fault list. The reason for the shutdown is
displayed for information during the idle time.
Remedy
Only when a fault has been entered into the fault
list: Check the flow temperature monitoring and
the HP sensor.
Check the volume flow and temperature on the
heating side.
Check the volume flow and the layout of the
source side.
Check the refrigerant level (sight glass).
Check contactors K1 and K2 and replace, if
required.
Monitor the flow temperature and check the high
pressure sensor.
Check the volume flow and the temperature on the
heating side.
Compressor turns in the wrong direction.
Change the rotational direction by interchanging
two supply cores
Check the minimum source temperature and
change it, if required.
Check the source volume flow. Check the source
layout.
This requires no action, as it is a controlled
shutdown
Fault
High pressure
sensor max
Controlled
shutdown.No fault.
Low pressure
Contactor stuck
High pressure
No power
Source min.
Hot gas max.
Controlled
shutdown.No fault.
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