Weishaupt W-FM 100 Installation And Operating Instruction page 211

Fault Diagnostic Cause
codes code
A6 50 ... 5A Load controller input error
50 Short circuit at input X60:1/4
51 Break at input X60:1/4
52 Break at input X60:2/4
53 Short circuit at input X60:3/4
54 Break at input X60:3/4
55 Short circuit at input X60:3/4
56 Break at input X60:3/4
57 Excess voltage at input X61
58 Break or short circuit at input X61
59 Excess voltage at input X62
5A Break or short circuit at input X62
A6 5B The output value is not available for output
X63 in the current configuration.
A6 5C FGR sensor is not available in the current
configuration.
A6 60 ... 6F Internal load controller fault
A6 70 ... 77 Load controller input signals fluctuate too
much
70 Signal fluctuation input X60:1/4
71 Signal fluctuation input X60:2/4
72 Signal fluctuation input X60:3/4
73 Signal fluctuation PWM
74 Signal fluctuation U-input X61:2
75 Signal fluctuation I-input X61:3
76 Signal fluctuation U-input X62:2/4
77 Signal fluctuation I-input X62:3/4
A6 78 ... 7F Load controller input signals too great or in-
correct polarity.
78 Excess voltage or incorrect polarity input
X60:1/4
79 Excess voltage or incorrect polarity input
X60:2/4
7A Excess voltage or incorrect polarity input
X60:3/4
7B Excess voltage or incorrect polarity PWM
7C Excess voltage or incorrect polarity input X61
7D Current flow is too high or incorrect polarity
input X61
7E Excess voltage or incorrect polarity input X62
7F Current flow is too high or incorrect polarity
input X62
A6 80 ... A6 Internal load controller fault
A6 A7 Incorrect or no additional sensor for boiler
cold start function defined.
A6 B0 ... FF Internal load controller fault
(1
If occurring sporadically: Optimise EMC measures. If occurring continuously replace defective component.
83054802 1/2018-07 La
Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
211-228
Rectification
The diagnostic code indicates which input is
affected.
Check electrical connection and sensor.
Change setting [ch. 6.12.7].
Change setting [ch. 6.15.3].
(1
Internal fault
The diagnostic code indicates which input is
affected [ch. 3.3.20].
Check electrical connection
Check signal (ripple voltage).
The diagnostic code indicates which input is
affected [ch. 3.3.20].
Check electrical connection
Check voltage or current.
(1
Internal fault
Change setting [ch. 6.12.14].
(1
Internal fault
9 Troubleshooting