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Instruction manual ADM 55
11.5 Troubleshooting table - 'insufficient hot water'
Warning
Maintenance may only be performed by a qualified service and maintenance engineer.
Insufficient hot water
Symptom Cause Precautions Comment
Insufficient hot water Water temperature
setting (T
set
) is too low
Set the control thermostat (7.5 "
Control thermostat") to a higher
value
Hot water supply is
used up
1. Reduce hot water consumption and give the appliance time to
heat up.
2. If this error persists, check whether the high-limit thermostat is
switching. If this is the case, check that the circulation and/or top
to bottom circulation pump are working.
If the error has not been rectified, and no other cause can be found,
isolate the appliance from the mains (10.3 "
Isolating the appliance
from the mains"), shut off the manual gas valve and alert your
installation engineer.
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