Rotex HPSU compact 304, Instruction Manual

Page: 43 / 56

8 x Faults and malfunctions
BA ROTEX HPSU compact 4 - 09/2013
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8 Faults and malfunctions
8.1 Troubleshooting
Electronic control of the ROTEX HPSU compact:
– Signals a fault by red backlighting in the display and
– Shows a fault code in the display (see tab. 8-2).

An integrated fault memory stores up to 15 fault messages that
have occurred most recently.
Depending on the operating mode, the fault messages are also
forwarded to connected room stations or room thermostats.
8.1.1 Current fault display
1
2
3
E 75
Inside Unit:
Address:
Boiler
0
1 Fault message as code (see tab. 8-2)
2 Location information (equipment) of the detected fault
3 Bus address of the unit causing the fault
Fig. 8-1 Displays an active error message (controller fault)
1
2
3
4
Inside Unit:
Address:
Heating Module
0
E 9001
WWSensorInput
1 Fault message as code (see tab. 8-2)
2 Fault message as clear text (see tab. 8-2)
3 Location information (equipment) of the detected fault
4 Bus address of the unit causing the fault
Fig. 8-2 Displays an active fault message (heat pump fault)
8.1.2 Reading the fault memory
The last received (latest) fault message is in the first position.

All the other previous fault messages are then pushed backwards
by one place when a new entry is made. The 16th fault message
will be deleted every time a new fault message is received.
E75
E75
Special Level
Manual Operation
Error
Delete massage
Special Level
Error
Delete massage
Return
Inside Unit:
Address:
Boiler
0
Read Error Memory
Fig. 8-3 Read-out of fault memory
8.1.3 Solving failures
Troubleshooting the electrical, coolant and hydraulic
systems of the ROTEX HPSU compact may be per-
formed only by authorised and trained heating experts.