Repair manual

27
The electronic control unit can store up to 5 faults, which can
be read out and displayed with the timer.
The current error is shown as “AF” and is always written to
memory location F1. Previous faults are transferred to memory
locations F2 - F5; if necessary, the content of memory location
F5 is overwritten.
Connect diagnostic unit
Detach the HYDRONIC cable harness.
Connect the diagnostic unit to the adapter cable at the cable
harness, as shown in the diagram.
~ Call diagnostic fault code
Ä Clear the stored faults
Å Clear the stored faults
Ç Back, faults F5 - F1
É Forwards, faults F1 - F5
Ñ= Display with error message
Fault diagnosis with the diagnostic unit
Diagnostic unit
Cat. No. 22 1512 89 00 00
To connect the diagnostic unit,
an adapter cable is required.
Adapter cable
Cat. No. 22 1000 31 66 00
4 / Troubleshooting
Retrieve fault memories F1 to F5
• Switch on the HYDRONIC at the control element.
• Press
D
key on the diagnostic unit.
Display readout:
AF = current fault
3-digit number = fault code
• Press the
f
key once to display F1, twice for F2 etc.
The fault code, description of the fault and comments / reme-
dial measures are described on pages 30 to page 33.
Cancel control unit locking and simultaneously clear fault
memory
• Press the two
l
keys a minimum of 2 seconds
simultaneously ---> the control unit is unlocked and the
stored faults F1 to F5 are cleared.
Drawing 21
~ Diagnostic unit with
connecting cable
Ä Adapter cable
~