DORCHESTER DR-SA 16, Инструкция по установке, наладке и обслуживанию

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3.2 Fault finding
Fault Possible Cause Corrective Action
Heater is off or does Control thermostat satisfied None – heater will light up when
not ignite hot water temperature drops.
No electrical power Make sure electrical supply is
turned on at local isolator and heater on/off
switch. Check 230v supply is present
at the heater.
No gas Make sure all manual gas valves between meter
and heater are turned on fully. Check gas
pressure at the heater.
Burner ignition controller is in lock-out Press the illuminated reset button on
the control panel. If repeated lock-out occurs,
expert investigation is required
Safety thermostat has operated Investigate the cause (control thermostat
set too high, out of calibration or not working,
water circulation incorrect) and rectify before
pressing reset button on control panel
Combustion products discharge Investigate the cause (blocked flue, incorrect
safety device has operated flue, wind conditions, incorrect ventilation)
and rectify before pressing reset button on the
flue thermostat.
Insufficient hot water Temperature set too low Increase control thermostat setting
to higher value (recommended 60°C maximum)
Hot water usage greater Reduce hot water usage and allow time
than heater output for heater to fully recover to set temperature.
Water circulation system Investigate the cause (pump failure, air lock,
not operating correctly pipe blockage) and rectify. If cause not identified,
seek expert advice.
Noisy Ignition Incorrect gas supply pressure Check and set correct pressures
and/or poor flame shape or burner pressure
Dirty pilot and/or main injectors Clean injectors
Water leakage Condensation of flue gases Allow temperature in heater to increase
(see 2.11)
Local pipe work leaking Carefully investigate cause and rectify
Nearby appliance leaking by repair or replacement.
Groundwater seeping
Water heater leaking