ACV Prestige 24 Excellence, Инструкция по установке, эксплуатации и обслуживанию

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mcBA BlokING AND ERRoR coDES
codes description of the fault remedying the fault
Minimum gas pressure switch or water pressure switch
opened
Check the gas pressure switch or the water pressure switch
No fan signal present
1. Check the fan control connection
2. Check the fan wiring
3. If the problem persists after two RESET attempts,
replace the fan and / or the MCBA
The tacho signal of the blower does’nt go to zero
1. Check that the convection flow through the chimney is not high
enough to rotate the blower
2. If not, exchange the blower
Maximal difference T1 – T2 exceeded Check the water flow rate
NTC 1 short-circuit
1. Check the connection of the NTC 1 sensor
2. Check the wiring of the NTC 1 sensor
3. If the problem persists, replace the NTC 1 sensor
NTC 2 short-circuit
1. Check the connection of the NTC 2 sensor
2. Check the wiring of the NTC 2 sensor
3. If the problem persists, replace the NTC 2 sensor
NTC 3 short-circuit
1. Check the connection of the NTC 3 sensor
2. Check the wiring of the NTC 3 sensor
3. If the problem persists, replace the NTC 3 sensor
NTC 5 short-circuit
1. Check the connection of the NTC 5 sensor
2. Check the wiring of the NTC 5 sensor
3. If the problem persists, replace the NTC 5 sensor
NTC 1 open
1. Check the connection of the NTC 1 sensor
2. Check the wiring of the NTC 1 sensor
3. If the problem persists, replace the NTC 1 sensor
NTC 2 open
1. Check the connection of the NTC 2 sensor
2. Check the wiring of the NTC 2 sensor
3. If the problem persists, replace the NTC 2 sensor
NTC 3 open
1. Check the connection of the NTC 3 sensor
2. Check the wiring of the NTC 3 sensor
3. If the problem persists, replace the NTC 3 sensor
NTC 5 open
1. Check the connection of the NTC 5 sensor
2. Check the wiring of the NTC 5 sensor
3. If the problem persists, replace the NTC 5 sensor
Parameter values in EPROM values out of range
If the problem persists after two RESET attempts,
reprogram the MCBA
Internal error
If the problem persists after two RESET attempts,
replace the MCBA.
Flue gas temperature too high (NTC 5)
1. Check the connection of the NTC 5 sensor
2. Check the wiring of the NTC 5 sensor
3. If the problem persists, replace the NTC 5 sensor
Error while reading the parameters
1. Press "RESET"
2. If the error persists, replace the MCBA.
Air Pressure Switch closed when it should open Check the air pressure switch
Low water pressure Check the water pressure
Fan speed not within the dead band
1. Check the MCBA power supply voltage
2. If it is OK, replace the fan.
NTC6 temperature too high Check the 3-ways valve and the motor