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ACV HeatMaster Manual

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ENBlockage and error codes
660Y1400 - A
Codes
Fault description Fault solutions
E 15
Internal error If the problem persists after two “RESET” attempts, replace the MCBA
E 16
Internal error If the problem persists after two “RESET” attempts, replace the MCBA
E 17
Internal error If the problem persists after two “RESET” attempts, replace the MCBA
E 18
T1 > 110°C
1. Check the NTC wiring and replace if necessary
2. If the NTC1 sensor is OK, check if there is water flow in the boiler
E 19
T2 > 110°C Check the NTC wiring and replace if necessary
The NTC1 and NTC2 sensors are the wrong way round Switch NTC1 with NTC2
E 25
T1 Gradient too high
1. Check if the pump is running
2. If there is no problem with the pump, bleed the system
Gas pressure switch or low-water pressure switch open Check the gas pressure or the water pressure and the respective switches
Excessive temperature of the pump control module
1. Pump control overheated
2. Check the functionality of the pump (flow)
3. Check the pump for dirt
Boiler pump switch not activated, pump nonfunctional /
blocked
Check the functionality of the pump, pump does not run.
E 28
No tachometer signal from the fan
1. Check the PWM connection
2. Check the fan wiring
3. If the problem persists after two “RESET” attempts, replace the fan. Otherwise change the MCBA
E 29
The fan’s tachometer signal does not drop back to “0”
1. Check the draught in the flue pipe
2. If the draught is sufficient, replace the fan
E 30
Maximum temperature difference between T1 and T2 is
too high
Check the water flow rate
… 31


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  • Unable to reset (E 14) fault on Heatmaster 71 what are the relevant checks before changing board. pumps ok fans ok resistance reading on sensors ok Submitted on 24-6-2021 at 18:13

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