Weishaupt WTC 45-A, Installation And Operating Instructions Manual, Page: 56 / 90

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9 9 Cause and rectification of faults
Most irregularities and faults of the boiler are recognised
by the WCM and shown on the display. The display
differentiates between faults (boiler lockout) and
warnings.
Faults (crossed out flame signal flashes)
Proceed as follows with faults :
• Note down the fault displayed (flashing)
• Press reset key
Warning
With warnings the boiler does not lock out.
The warning is shown in the display and expires by
itself once the cause of the warning no longer exists.
Table of fault and warning message:
CODE Message Cause Possible fault/rectification
Temperatures
11 Fault Boiler temperature
≥
105°C • No water in boiler - top up water
• Air in boiler - vent boiler
• No boiler throughput - check function of pump,
clean water side of heat exchanger
12 Warning Boiler temperature
≥
95°C • No water in boiler - top up water
• Air in boiler - vent boiler
• No boiler throughput - check function of pump,
clean water side of heat exchanger
13 Fault Flue gas temperature
≥
120°C • Heat exchanger heavily soiled
14 Warning Flow temperature • Air in boiler - vent boiler
gradient too large • No boiler throughput
• System pressure too low
15 Warning / Temperature differential between • Heat exchanger through flow insufficient
fault ) boiler temp. and flue gas temp. too high
16 Warning Flue gas temperature
≥
115°C • Heat exchanger heavily soiled
18 Warning Ratio STL/flow • Heat exchanger through flow insufficient
1) After 30 consecutive warnings the boiler goes to
lockout.