A.O. Smith SGS - 100, Installation, User And Service Manual

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Instruction manual SGS 86
13.2 Troubleshooting table for general errors
Warning
Maintenance may only be performed by a qualified service and maintenance engineer.
General errors
Indication Cause Measure Remark
Gas smell Gas leak
Warning
Close the main gas valve at once.
Warning
Do not operate any switches.
Warning
No naked flames.
Warning
Ventilate the boiler room.
Warning
Immediately contact your installation engineer or local gas
company.
The display is off The water heater is off Start the water heater (9 "Starting the water heater")
No supply voltage
present
1. Check whether the isolator is ON.
2. Check that there is power to the isolator.
3. Check whether the ON/OFF switch of the controller is ON
(position I).
4. Check whether there is power to the electrical connector block.
5. The measured voltage must be 230 V
AC
(-15%, +10%)
See the electrical diagram (17 "Appendices").
If the error persists, consult your installation engineer.
Defective fuse(s) Replace fuse(s) To replace the fuses, you must contact your installation engineer.