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Instruction manual DR-LA
55
Warning
Maintenance may only be performed by a qualified service and maintenance engineer.
8.4
Troubleshooting table "insufficient hot water’"
If the water heater fails to supply any hot water, there are several possible causes.
Refer to
Table 8.3 Insufficient hot water
Table 8.3 Insufficient hot water
Symptom
Cause
Solution
Remark
Insufficient hot water
The water temperature
setting (T
set
) is too low
Set the control thermostat to a higher setting. See paragraph
Hot water supply used
up.
1. Reduce the rate of hot water consumption. Allow the water
heater enough time to heat up the water.
2. If this error occurs regularly, check whether the high-limit
thermostat is cutting in/out. If so, check that the circulation-
and/or top to bottom recirculation pump are working properly.
If the error has not been rectified and no other cause can be found,
isolate the water heater from the power supply, shut off the gas
valve and alert your installer.
