Ariston E-COMBI 24 30 38 Fault finding Overheat Insufficient, Circulation, Insufficient water

maintenance guide

Fault finding

Overheat
Insufficient	Water pressure
circulation
	Bleed heat exchanger
	Pump operation
	CH return filter for blockages
	Circulation around boiler (blockages)
	ntc temperature sensors
Insufficient water	Water pressure gauge for correct pressure
(request filling)
	Check for waterleaks on the entire system
CH Flow temp.	Check connections and wiring to temp
probe circuit open/	sensors
short circuit
CH Flow temp.	Resistance values of temp sensors
probe circuit open/
short circuit
Heating delivery	Details in maintenance guide in installation
probe problem	manual
Floor thermostat	Check terminals TA2 for presence of link
contact open	wire
EEPROM Error	Check the EEPROM connection onto the
	pcb
Communication	Check connection and wiring onto all
error	devices, main and display pcb
Main PCB error
Too many (>5)	Identify reason for lockout from table and
resets in 5 minutes	check for relevant faults
No Flame detected	Insufficient working gas pressure
1st Ignition failed	Spark electrode/wiring connectors
2nd Ignition failed	Ignition electrode/wiring connectors
Flame cut-off	Spark generator/wiring connectors
	Check flue system for correct assembly/
	termination
	Check earth
	Gas valve
	CO2 settings
	Soft light rate

Flame detected	Ignition electrode/wiring connectors
with gas valve
closed
	Ignition electrode wiring connection onto
	main pcb
Flame lift	Insufficient working gas pressure
	Check flue system for correct assembly/
	termination
	CO2 settings
Thermofuse open	Check wiring and connections to
	thermofuse
	Check integriry of main heat exchanger
Fan speed error	Check fan
	Check wiring connections from fan to pcb

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