0020213394_05 Installation and maintenance instructions
51
Code
Meaning
Cause
Remedy
F.514
Sensor fault: Compr. inlet temp.
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.517
Sensor fault: Compr. outlet temp.
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.519
Sensor fault: Building circuit re-
turn temp.
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.520
Sensor fault: Building circuit flow
temp.
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.532
Building circuit: Flow rate too low
–
Stopcock was not opened
–
Building circuit pump defective
–
All consumers in the heating system
are closed
–
Thermostatic valve(s) defective
–
No bypass valve available in sys-
tems without a buffer
–
Bypass valve incorrectly set or de-
fective
–
Air in the heat pump
–
Pump has insufficient output or is
defective
–
Condenser is dirty
–
Existing dirt filter clogged
–
Check the stopcocks, thermostatic
valves, bypass valve and dirt filter
–
Ensure that the flow rate is at least
35% of the nominal flow rate
–
Check that the building circuit pump
functions correctly
–
Purging the building circuit
F.546
Sensor fault: High pressure
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor (e.g. using an in-
stallation aid), and replace if neces-
sary
–
Replace the cable harness
F.583
Building circuit: Flow temp. too
low
–
4-port valve is mechanically blocked
–
Temperature sensor in the flow is
defective
–
Air in the building circuit
–
Check the building circuit flow rate
–
Check the quality of the plug contact
on the PCB and on the cable har-
ness
–
Check that the sensor is working
correctly (resistance measurement
using sensor characteristic values)
–
Replace the sensor
–
Purging the building circuit
F.685
Connection error: Contr. not re-
cognised
–
System control was previously detec-
ted but the connection is broken
–
Check the eBUS connection to the
system control
F.701
Sensor fault: Env. circuit inlet
temp.
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.702
Sensor fault: Env. circuit outlet
temp.
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.703
Sensor fault: Low pressure
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.704
Sensor fault: Build. circ. pressure
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.705
Sensor fault: Env. circuit pressure
–
Sensor not connected or sensor
input has short-circuited
–
Check the sensor, and replace if
necessary
–
Replace the cable harness
F.708
Connection error: Fan unit 1:
–
No electrical connection
No eBUS connection
–
Check the electrical connection to
fan unit 1 (check the line connection;
contact fault? Has the circuit breaker
tripped in the connection box?)
–
Check the eBUS connection to fan
unit 1
–
Check the address switch position
on the PCB of fan unit 1. Required
switch position: 1