A.O. Smith SGS - 100, Installation & Service Manual

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Instruction manual SGS 77
Water leakage Leakage from a water
connection (threaded)
Tighten the threaded connection If the leak persists, consult your installation engineer
Condensate leakage Check that the condensation water discharge is working properly.
Rectify if necessary
Leakage from another
nearby water appliance
or pipe segment
Trace the leak
Leakage from the
appliance's tank
Consult the supplier and/or manufacturer
Explosive ignition Incorrect supply
pressure and/or burner
pressure
Set the correct supply pressure and/or burner
pressure. (3.13 "Checking the supply pressure and burner
pressure")
If ignition is not improved, consult your installation engineer.
Contaminated burner Clean the burner(s) (15.4.2 "Clean the burner(s)")
Contaminated orifice Clean the orifice(s) (15.4.3 "Clean the orifice(s)")
Hot water supply
insufficient or absent
Appliance is turned off Start the appliance up (9 "Starting and running")
No supply voltage
present
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%).
See the SGS electrical diagram (17 "Appendices")
If the error persists, consult your installation engineer.
Hot water supply is
used up
Reduce hot water consumption and give the appliance time to heat
up.
If there continues to be insufficient hot water, or none at all, consult
your installation engineer.
The controller is in OFF
mode.
Switch the controller to the ON mode (11.3 "Switching on the "ON
mode"")
Temperature (T
set
) is
set too low.
Adjust (11.4 "Setting the water temperature") temperature (T
set
) to
a higher value.
Symptom Cause Solution Remark