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Code
Meaning
F.83
Flow and/or return temperature sensor tempera-
ture change fault
F.84
Fault: Flow/return temperature sensor temperature
difference implausible
F.85
Fault: Flow and return temperature sensors incor-
rectly fitted
F.90
Communication with actoSTOR module interrupted Check cable harness from boiler to actoSTOR module (PEBus).
LED acto-
Status of actoSTOR electronics
STOR
module
F.91
Sensor/actuator fault on actoSTOR module
F.92
Coding resistor fault
F.93
Gas group fault
Commu-
No communication with the PCB
nication
fault
13.2 Fault codes (continued)
13.3
Using the function menu
In order to remedy boiler problems, you can use the func-
tion menu, which allows you to actuate and test individual
components of the heating installation (¬ section 12.3).
13.4
Running test programs
By activating various test programs, you can trigger special
functions on the boiler (¬ tab. 10.1). The display shows
which test program you have chosen.
> Read how to start the test programs in ¬ section 10.4.
Installation and maintenance instructions ecoTEC plus 0020134833_01
Cause
When the burner starts, the temperature change registered at the flow
and/or return temperature sensor is non-existent or too small.
- Not enough water in the boiler
- Flow and/return temperature sensor not in correct position at pipe.
Flow and return temperature sensors returning implausible values.
- Flow and return temperature sensors have been inverted.
- Flow and return temperature sensors have not been correctly fitted.
Flow and/or return temperature sensors
have been fitted to the same pipe/wrong pipe.
If the boiler is to be operated without an actoSTOR module, set D.092 =
0.
LED on: Communication OK
LED flashing: Communication not OK
LED off: No power supply
The coding resistor on the PCB does not match the entered gas family:
Check the coding resistor, repeat the gas family check and enter the cor-
rect gas family.
Combustion quality outside the permitted range: Wrong gas restrictor,
recirculation, wrong gas group, internal pressure measuring point in Ven-
turi blocked (do not use lubricant on the O-ring in Venturi), Gas family
check prematurely terminated.
Communication fault between display and PCB in the electronics box
13.5
Resetting parameters to factory settings
As well as the option to manually reset individual parame-
ters to the factory settings specified in ¬ tab. 11.1, you can
also reset all parameters at once.
> Set the value of the diagnostics code parameter D.096 to
"1" (¬ section 11.1).
You have now reset all parameters to factory settings.
Troubleshooting
13
73
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