10 Instruction manual PH500H Please keep this instruction manual for future reference
TROUBLESHOOTING
FAN DOES NOT RUN ON ANY SWITCH SETTING
› Check the power supply is switched ON.
› Check fuse in fused spur.
› Check the wiring connections at the fused spur.
HEATER DOES NOT SWITCH ON WHEN CENTRAL
› Check the top switch is set to “0” and the bottom switch is heating is on is set to “I”
or “II”.
› Check the unit is not air locked. Use bleed valve in front of the unit to release any air.
› Balance the central heating system if installed on same circuit as panel radiators and
increase the circulating pump speed if required.
› Increase the boiler temperature.
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