is
Instruction manual GWV
75
Features
Cause
Measures to take
Comment
Explosive ignition
Incorrect supply
pressure and/or burner
pressure
Set the correct supply pressure and/or burner
pressure.
(3.11 "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 injector(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 GWV 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.
Summary of Contents for GWV - 120
Page 2: ...www aosmithinternational com your installer ...
Page 4: ...4 Instruction manual GWV gis ...
Page 8: ...Table of contents 8 Instruction manual GWV ...
Page 12: ...Introduction 12 Instruction manual GWV 1 gis ...
Page 40: ...Installation 40 Instruction manual GWV 3 is ...
Page 42: ...Conversion to a different gas category 42 Instruction manual GWV 4 is ...
Page 46: ...Filling 46 Instruction manual GWV 5 gis ...
Page 58: ...Starting and running 58 Instruction manual GWV 9 gis ...
Page 60: ...Shutting down 60 Instruction manual GWV 10 gis ...
Page 72: ...Service program 72 Instruction manual GWV 12 is ...
Page 86: ...Troubleshooting 86 Instruction manual GWV 13 gis ...
Page 88: ...Maintenance frequency 88 Instruction manual GWV 14 is ...
Page 98: ...Appendices 98 Instruction manual GWV 17 is ...
Page 100: ...Instruction manual GWV 100 ...
Page 102: ...0307 971 4 0 UK Index Instruction manual GWV ...