A.O. Smith STE - 400, Инструкция по установке, эксплуатации и обслуживанию

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Installation, User and Service Manual
18
4.2 Troubleshooting table
Symptom Cause Precautions Comment
Water leakage Leakage from a water connection (threaded). Tighten the threaded connection. If the leak persists, consult you
installation engineering.
Leakage from another nearby water heater or pipe
segment. Trace the leak.
Leakage from the water heater tank. Consult you supplier, installer and/or manufacturer.
Condense. Stop draining of (to much) hot water until the water
reached the set temperature.
Insufficient or no hot
water No supply voltage. 1. Check whether the electrical element is ON.
2. Check the main power supply.
3. Check whether there is power on the element.
If the error cannot be resolved or is
persistent, contact your installation
engineer.
The element is switched off. 1. Check whether the element is ON.
2. Check whether there is power on the connector block of
the element.
3. Check whether the element(s) is defective.
Safety thermostat has cut out. 1. The safety thermostat cut out correctly:
- Reset the element.
- 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.
Water temperature setting is too low. Set the control thermostat to a higher value .
Element defect. 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. To replace the necessary parts, you
must contact your installation
engineer.