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6 list of alarms
alarm name
High return temp
Temp diff brine
Compressor current
Brine pump current
High pressure
Low pressure
Low brine flow
Brine pressure
Compressor heat
Control pressostat
Sensor supply temp
Sensor return temp
Broken outdoor temp
Sensor hot water
Sensor hot gas temp
Sensor brine in
Sensor brine out
Sensor prim. supply
Hpc rm communication
24 vac power fail
Communication master
High brine in temp
automatic
acknowledge
Class
reset
required
B
X
B
A
A
A
A
A/B
A/B
A
B
X
B
X
B
X
B
X
B
X
B
X
B
X
B
X
B
X
A
X
A
X
A
X
B
X
explanation
The temperature on the heat pump return is too high
for the heat pump to work efficiently. The heat pump
has ceased to produce heat.
X
The difference in temperature between incoming and
outgoing brine is large. This may be due to low flow rate.
X
The current overload protection for the compressor
has triggered.
X
The current overload protection for the brine pump has
triggered.
X
The high pressure guard has triggered.
X
The low pressure guard has triggered.
X
The flow guard for brine has triggered.
X
The pressure guard for brine has triggered.
X
The temperature overload protection for the compres-
sor has triggered.
The controller pressostat has been triggered for a long
time.
A fault in the heat pump's supply temperature sensor
has been detected.
A fault in the heat pump's return temperature sensor
has been detected.
A fault in the outdoor temperature sensor has been
detected. The control system assumes the outdoor
temperature is zero.
A fault in the temperature sensor for hot water has
been detected.
A fault in the sensor for hot gas temperature has been
detected.
A fault in the heat pump's incoming brine temperature
sensor has been detected.
A fault in the heat pump's outgoing brine temperature
sensor has been detected.
A fault in the primary supply line temperature sensor
has been detected.
Communication error with the HPC RM module. This
module contains the heat pump's relays.
A power failure on 24 VAC has occurred.
Communication with the master pump has failed.
The incoming brine temperature is too high. The alarm
is part of the brine control function.
Danfoss – 39
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