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● Advanced error code display for more convenient operation and maintenance.
Error codes:
● Common failures and treatment.
Temperature sensor error A0
Outlet temperature sensor error A7
Water flow over maximum value CA
Exhaust obstruction CF
Wrong connection of air pressure switch C4
APS has no pressure C6
Overheat protection E1
Defective inlet temperature sensor E2
Thermostat error E9
Flameless
EA
Gas valve connection error EE
Wrong flame signal E7
Gas valve leak FA
No sign of flame EC
Phenomena
Treatment
Causes
The gas valve is not
open
Gas valve is half open
The gas pipes are
full of air
Inappropriate
gas pressure
High
Freezing
Inlet with inadequate
hydraulic pressure
Burner is blocked
Low
The fire does not go away even after the
heater is turned off
The flame goes out when the unit is set
to Winter position
The water is too hot in the low
temperature position
Water does not heat even in high
temperature position
Abnormal sound during ignition
Abnormal flame accompanied by
abnormal odors
Yellow flame accompanied by black
smoke
Deflagration
Unit will not turn on after starting
Power off during operation
Fully open the gas valve or
replace with a new gas container
Fully open the gas valve
Open and close the water outlet
valve continuously several times
until ignition is achieved
Have maintenance personnel
check the gas pressure
regulating valve
Contact maintenance personnel
Ask maintenance personnel
to check hydraulic pressure
Contact maintenance personnel
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