A.O. Smith Theta T Series, Installation, User And Service Manual

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Installation-, User- and Service Manual
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8.2 Troubleshooting table for general errors
Indication Cause Measure Remark
Water leakage Leakage from water
connection (threaded). Tighten the threaded connection. If the leak persists, consult your installation engineer.
Leakage from another nearby
water heater or pipe segment. Trace the leak.
Leakage from Theta dual
service module parts. Trace the leak. If leakage can not be solved replace leaking part
or consult the supplier and/or manufacturer.
Heating system stays
cold
(1/2)
The water heater is off. Start the water heater (see Installation-, User- and Service
manual of the water heater, 9 "Starting the water heater") - See electrical diagram (11
“Appendices”).
- If the error persists, consult you installation
engineer.
No supply voltage present on
the water heater and
controller of the Theta dual
service module. 1. Check whether the isolator is ON.
2. Check that there is power to the isolator.
3. Check whether the ON/OFF-switch of the controller, of the
water heater, is ON (position I)
4. Check whether there is power to the electrical connector
block of the water heater.
5. The measured voltage must be 230 V
AC
(-15%, +10%).
Heating functionality has not
been activated. Activate the heating functionality (6.2 "Heating functionality"). If there continues to be insufficient or no hot water,
consult your installation engineer.
Room thermostat is not
connected or is not
functioning. 1. Check whether the room thermostat is connected correctly
(electrical).
2. Check whether the cable (from controller to thermostat) is
connected (electrical) to the room thermostat.
Check whether the room thermostat is functioning.
Hot water supply is used up. Reduce hot water consumption and give the water heater time to
heat up.
Heating setpoint is set to low. Set the heating setpoint to a higher setting (6.3 "Setting heating
setpoint").
Priority protocol is active. Check whether the priority protocol (production of DHW-water
has priority over the production of heating water) is active.
Table continues on next page.