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

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Instruction manual SGS 82
Dirty or blocked fan 1. Check if the fan is dirty
2. Check that the rotor can rotate freely
3. Reset appliance controller
Because of a drop in
the supply voltage, the
fan is not running at the
correct speed.
1. Check the supply voltage, this must be 230 VAC (-15%, +10%).
2. Reset appliance controller
The F02 entries below are applicable solely to appliances that have a 3-phase fan with frequency controller.
Fun supplying
insufficient pressure
The live (phase) wires,
between freq. controller
and fan are connected
wrong way around
1. Check the wiring between the fan and the frequency controller
2. Rectify the assembly if it is incorrect
3. Reset appliance controller See the SGS electrical diagram (17 "Appendices")
To replace the necessary parts, you must contact your installation
engineer
Fan speed too low 1. Check the fan speed
2. If the fan speed is too low, check the settings
3. If the settings are correct, then replace the fan.
4. Modify the settings if incorrect
5. Reset appliance controller
Air pressure switch fails
to close during pre-
purge.
Air pressure switch
leads
1. Check the wiring between the air pressure switch and the
controller. Rectify any defect:
-
if any wires are damaged, replace the wiring harness
- properly connect loose or detached hoses
2. Reset appliance controller
Loose air pressure
switch hoses
1. Check hoses between air pressure switch and burner/fan.
Rectify any defect:
-
if any wires are damaged, replace the wiring harness
- properly connect loose or detached hoses
2. Reset appliance controller
Code + Description Cause Solution Remark