Troubleshooting Table - A.O. Smith STE-1000 Installation, User And Service Manual

9.2

Troubleshooting table

Symptom Cause
Water leakage Leakage from a water connection (threaded).
Leakage from another nearby water heater or pipe
segment.
Leakage from the water heater tank.
Condens.
Insufficient or no hot No supply voltage.
water
The water heater is switched off.
Safety thermostat has cut out.
Water temperature setting is too low.
Element(s) defect.
96
Installation, User and Service Manual STE
Precautions
Tighten the threaded connection.
Trace the leak.
Consult you supplier, installer and/or manufacturer.
Stop draining of (to much) hot water until the water
reached the set temperature.
1. Check whether the isolator is ON.
2. Check whether there is power on the isolator.
1. Check whether the isolator is ON.
2. Check whether there is power on the isolator.
3. Check whether the switch on the control unit is ON.
4. Check whether these is power on the connector block.
1. The safety thermostat cut out correctly:
- Reset the water heater.
- Check whether the control thermostat is working.
- Check whether the circulation pump is working.
2. The safety thermostat has cut out without apparent
reason:
- Check whether the thermostat is defective.
- Check whether the sensor of the thermostat is
defective.
Set the control thermostat to a higher value
heater operating cycle").
Check the resistance of the element(s). At roomtempe-
rature the resistance of a element must be between 32 and
33 Ohm. If the resistance value is significantly different
(due to closed or open circuit) this indicates a fault element
and should be replaced. worden.
Comment
If the leak persists, consult you
installation engineering.
If the error cannot be resolved or is
persistent, contact your installation
engineer.
(7.3 "Water
To replace the necessary parts, you
must contact your installation
engineer.