A.O. Smith Innovo 12-160, Installation, Service & Maintenance Manual

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12 Troubleshooting
12.1 Errors and warnings
The water heater can have three different kinds of errors and warnings:
General errors (see section 12.1.1), which are not displayed
Displayed errors (see section 12.1.2), which are divided in two different groups:
Lock out errors: when the cause is removed, you can reset the error to resume
operation. The displayed code and the back-light of the display blink.
Blocking errors: when the cause is removed, the error resets automatically to
resume operation. The code is displayed continuously and the back-light of the
display blinks.
Displayed warnings (see section 12.1.3)
Note
It is possible to view the error history of the water heater, refer to Error history (see
section 10.4).
12.1.1 General errors
Note
For the coding of the connections, refer to the Electrical wiring diagram (see section
13.4).
Indication Cause Measure
Gas smell There is a gas leak Close the mains gas valve at once.
Do not operate any switches.
No naked flames.
Ventilate the boiler room.
Immediately contact your installation
engineer or your local gas company. •
•
•
•
•
The display is off The water heater is off. Turn on the water heater (see section 4.2).
There is no supply voltage. Make sure that:
the control switch is set to I.
the isolator is in ON position.
there is power on the isolator.
there is power to the electrical connector
block.
The measured voltage must be
230 V
AC
(-15%, +10%).
•
•
•
•
Defective fuse(s) Replace the fuse(s).
•
•
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