Esys Errors And Blocking Codes; List Of Error Codes + Solutions - ACV Solo 18 Installation, Operating And Servicing Instructions

"esYs" errors and blockIng codes

lIst of error codes + solutIons

[in error mode]
If a fault occurs during operation, the system locks out and the screen starts to
flash.
The first character is an "E" and flashes, the following two characters indicate
the code for this fault, see the chart below.
codes description of the fault
E 01 No flame presence after five start-up attempts
E 02 Abnormal flame signal detected
Maximum thermostat open
E 03
T1 or T2 > 110°C
E 05 No tachometer signal from the fan
E 07 Flue gas temperature too high (NTC5)
E 08 No flame detection
E 09 Gas valve relay error
E 11
Crack of sensor NTC1 or NTC2
E 13 Remote "RESET" error
E 21 ADC error
E 25 CRC Error
E 30 Short circuit NTC1
E 31
NTC1 open circuit
E 32 Short circuit NTC3
E 33 NTC3 open circuit
E 34 Deviation of the mains frequency > 1.5 Hz
E 37
Water pressure
E 41 No communication from the water pressure sensor
664Y4200 • F
To unlock the system:
• Press "RESET" on the screen.
• If the fault reoccurs, contact your installer.
solution for the fault
1. Check the wiring (short circuit in the 24 V wiring)
2. Check the electrode and its position
3. Check the burner gas level
1. Check the ignition wiring
2. Check the electrode and its position
3. Replace the ESYS (water damage)
Check the link across 9-10. Check the thermostat and wiring if fitted.
1. Check the NTC wiring and replace it if necessary.
2. If the NTC1 sensor is OK, check if there is water flow in the boiler
1. Check the PWM connection
2. Check the fan's wiring
3. If the problem persists after two "RESET" attempts, replace the fan,
if not, replace the "ESYS" circuit board.
1. Check the connection of the NTC5 sensor
2. Check the wiring of the NTC5 sensor
3. If the problem persists replace the NTC5 sensor
1. Check the electrode gap
2. Check the electrode resistance [1kΩ]
If the problem persists after two "RESET" attempts, Replace the "ESYS"
circuit board if necessary
Check the sensor NTC1 and NTC2
1. Do a local "RESET" on the boiler.
2. If the problem persists replace the "ESYS" circuit board
"RESET" the system or Replace the "ESYS" circuit board if necessary
"RESET" the system or replace the "ESYS" circuit board if necessary
1. Check the connection of the NTC1 sensor
2. Check the wiring of the NTC1 sensor
3. If the problem persists replace the NTC1 sensor
1. Check the connection of the NTC1 sensor
2. Check the wiring of the NTC1 sensor
3. If the problem persists replace the NTC1 sensor
1. Check the connection of the NTC3 sensor
2. Check the wiring of the NTC3 sensor
3. If the problem persists replace the NTC3 sensor
1. Check the connection of the NTC3 sensor
2. Check the wiring of the NTC3 sensor
3. If the problem persists replace the NTC3 sensor
Check the mains frequency
Check the water pressure
Check the water pressure sensor and replace if necessary
EN • 42