Ravenheat CSI 85 - Manual (Page 41)

FAULT FINDING DOMESTIC HOT WATER
Before continuing it may be necessary to see Central Heating Fault Finding (Sect.8)
- All gas supply cocks are open and the gas supply has been purge of air.
- The heating system pressure is at least 1 bar min to 1.5 bar Max.
- Main Switch on and power indicator light is on
- Select “Summer” (Fig.35 item 1A)
- Domestic Hot Water control knob to maximum (Fig.35 item 5)
- Open Domestic hot tap close to the appliance
Ensure Domestic
Hot Water fl ow is
min. of 3 l/min
Check fi lters are
clean
No
Is low pressure
in the system
Re-pressure the
system
Does the fl ow
detector light?
Check/Replace
DHW diverter
valve
No
No
Yes
No
Yes
No
Yes
FAILED DHW SENSOR
- Check /Replace DHW sensor and cables
FAILED LOW WATER PRESSURE SWITCH
- Check /Replace Low water pressure switch
- Check system pressure
FAILED HEATING SENSOR
- Check / Replace heating sensor
RESET THE BOILER
- Push the Reset button on Digital Display and
check LCD if illuminate
Yes
Does the DHW
temperature
stabilise at set point ?
Yes
Check / Replace DHW potentiometer No
END OF DOMESTIC HOT WATER TEST
Does main burner
light?
No Check / Replace DHW sensor
FAILED FLUE TEMPERATURE
- Check operating system
No
No
No
Check and replace the
diverter valve motor
Yes
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