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Instruction manual ADM 51
11.4 ADMP Troubleshooting table - no hot water
Warning
Maintenance may only be performed by a qualified service and maintenance engineer.
No hot water
Symptom Cause Precautions Comment
Red LED in the on/off
switch is off
No supply voltage
present
1. Check if the isolator is ON.
2. Check the voltage at the main switch.
3. Check the voltage at the electrical connector block.
No ignition (pilot light
is LIT)
No supply voltage
present
1. Check if the isolator is ON.
2. Check whether there is power to the isolator
The voltage measured must be 230 VAC + 15% -10%
If the error cannot be rectified, contact your installation engineer
Pilot light is not lit High-limit thermostat
has been activated
1. Wait until the water temperature has dropped sufficiently.
2. Starting and running
the appliance.
If the error cannot be resolved or is persistent, contact your
installation engineer
Flue gas outlet blocked 1. Trace the blockage
2. Remove the blockage
3. Reset the flue gas thermostat
Pilot light has been
blown out
1. Starting and running
the appliance.
The safety thermostat
has cut out
1. The safety thermostat has cut out correctly:
- Check whether the control thermostat is working.
- Check whether the high-limit thermostat is working.
- Check that the circulation pump (if present) is working
2. The safety thermostat has cut out without apparent reason:
- Check that the thermostat is not broken.
- Check that the thermostat sensor is not broken.
If the error cannot be resolved or is persistent, contact your
installation engineer
No gas 1. Check that the manual gas valve is open.
2. Check that gas control opens (gas control "clicks").
3. Check the gas control wiring.
51


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