A.O. Smith DRE 52, Инструкция по установке, эксплуатации и обслуживанию

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10 Troubleshooting
10.1 General errors
Note
For the coding of the connections, refer to the Electrical wiring diagram.
Indication Cause Measure
Water leakage There is a leakage from a threaded
water connection. Tighten the threaded connection.
There is a leakage from another nearby
water heater or pipe segment. Trace the leakage.
There is a leakage from the water heater
tank. Contact the supplier of your water heater.
Insufficient or no hot
water The water heater is off. Turn on the water heater (see 4.1).
The temperature is set too low. Set the regulating thermostats higher.
There is no supply voltage. Make sure that:
- the isolator is in ON position.
- there is power on the isolator.
- there is power to the electrical
connector block.
The measured voltage must be
400 V
AC
(-15%, +10%).
The hot water supply is used up. Reduce the hot water consumption. Wait
until the water heater heats up.
A safety device is activated. - Make sure that the voltage between
the connections of the heating
elements is 230VAC (-15%, +10%).
- Refer to indication "A safety device is
activated", next page.
Earth leakage circuit
breaker is out There is not enough water in the tank. - Make sure that the water heater is
filled with water.
One of the heating elements is
defective. - Measure the resistance value between
each heating element connection and
the outside of the tank. The value
must be infinite.
- Determine which element is defective.
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0313851_DRE_NLUKFR, 30-03-2022 49
EN