A.O. Smith ADMR - 40 Installation, User And Service Manual page 67

Symptom Cause
Explosive ignition Incorrect supply
pressure and/or burner
pressure
Poor flame profile
Contaminated burner
Contaminated orifice
Inadequate air supply
Hot water supply Appliance is turned off
insufficient or absent
No supply voltage
present
Hot water supply is
used up
The controller is in OFF
mode.
Temperature (T
set too low.
Instruction manual ADMR
Solution
Set the correct supply pressure and/or burner
pressure. (3.11 "Checking the supply pressure and burner
pressure")
Clean the burner(s) (15.4.2 "Clean the burner(s)")
Clean the orifice(s) (15.3.4 "Clean the orifice(s)")
Improve the air supply by providing better ventilation in the boiler
room.
Start the appliance up (9 "Starting and running")
1. Check if the isolator is ON.
2. Check that there is power to the isolator.
3. Check whether the ON/OFF switch of the electronic controller is
ON (position I).
4. Check whether there is power to the electrical connector block.
5. The measured voltage must be 230 VAC (-15%, +10%).
Reduce hot water consumption and give the appliance time to heat
up.
Switch the controller to the ON mode (11.2 "Switching on the "ON
mode"")
) is Adjust (11.3 "Setting the water temperature") temperature (T
set
a higher value.
Remark
If ignition is not improved, consult your installation engineer.
See the ADMR electrical diagram (17 "Appendices")
If the error persists, consult your installation engineer.
If there continues to be insufficient hot water, or none at all, consult
your installation engineer.
) to
set
is
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