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Troubleshooting/Fault Remedy
AEROTOPT LOGON B WP61 Troubleshooting/Fault Remedy
34
Problem Cause Remedy, Action
107: Hot gas compressor
Hot gas temperature (B81) too high
A
Not enough coolant
B Compressor leak
C Filter dryer dirty
D
Defective non-return valve
E
4-way valve leaking
F
Injection valve not working
A
Top off coolant
B Replace compressor
C Check the difference in temperature between the filter
drier inlet and outlet ( ∆ T max = 3)
D Temperature at the compressor inlet and outlet is
practically identical. Sounds could be heard at the
non-return valve.
E Check the temperature difference between the 4-way
valve input inlet and outlet ( ∆ T max=5K)
F Check injection valve, check position of capillary sensor
The refrigerant technician must be called in such cases.
146: Sensor control
element
configure-
tion
A The connected sensors are not suitable
for the given function of the programmable
inputs/outputs.
A Check sensor assignment
A1 Check programmed function at Qx outputs
A2 Check system configuration by means of control numbers
204: Fan overload Affects E14 (EX4).
A
Parameter set incorrectly on LOGON B WP
B Fan is defective
A
Check the setting of the parameter 5700 (should
correspond with the diagram number of an air-water
HP, >= 20)
B Check the input voltage on terminal E14 (rest contact)
B1 For load shedding check electric wiring.
Check
connections
B2 Replace fan
222: High pressure
during HP operation
Affects contact E10 at the LOGON B WP61.
High-pressure problem during operation of heat
pump. High-pressure pressure controller
triggered in cooling circuit. No heat can be
emitted.
A
In heating mode
A1 Insufficient flow rate
A2 Valve closed, non-return valves don’t close
A3 Heating or potable water circulation pump
not
running
A4 Overflow valve missing or set incorrectly
A5 Heating curve set too steep
The module switches the particular unit to the
safety mode when a malfunction or error occurs.
A1 Check hot water flow (
∆ T =5-10 K)
A2 Open slide valve. Check non-return valves and 3-way
switching
valves
A3 Check whether pump is working, restore function, replace
pump if necessary
A4 Install overflow valve, repeat setting procedure
A5 Set heating curve lower
B
If A can be precluded, the amount of coolant could be
too high.
The refrigerant technician must be called in this case.
223: HP when starting
HC
Affects contact E10 at the LOGON B WP61.
High-pressure problem when the heat pump is
started.
A
Water in system is too cold (below 10°C).
For compact HP:
B Upkeep valve does not open
(is set to 30°C, DO NOT ADJUST).
A
Below 10 °C: Raise temperature in system with electric
heating element.
B Vent system at buffer storage.
224: HP when starting
potable water
heating
Affects contact E10 at the LOGON B WP.
High pressure problem when starting potable
water mode.
A
Potable water charging pump not running
B Three-way valve opens too slowly or not at
all
C
Water volume too low
D
Air in the system
E Slide valve closed
F Heat exchanger surface in storage too
small or heat pump too large
G Sensor positioned incorrectly/too low in
storage
A
Unblock or replace pump
B Check three-way valve, replace if needed. Extend flow
time of condenser pump (Parameter 2802)
C Check temperature difference between flow and
return ( ∆ T =approx. 5-8 K)
D Vent system
E Open slide valve, check non-return valve
F Heat exchange area (in m
2
) = heating output HP at 20°C
air and 50°C water x 0.3. E.g. 10 kW x 0.3= 3.0 m
2
.
HP output, consult technical data for corresponding
source temperature.
G Install sensor correctly. Check position of potable
water
sensor