A.O. Smith ADM - 80 - Manual (Page 59)

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Instruction manual ADM 59
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.