Potterton Promax Ultra Boiler Error Codes

Potterton Promax Ultra Boiler Error Codes

Error code Possible fault
E09 Gas valve wiring fault
E10 Outdoor sensor error
E15 Gas valave connection fault
E20 Central heating thermistor sensor fault
E28 Flue thermistor fault
E40 Central heating return thermistor fault
E50 Domestic hot water sensor fault
E53 Flue obstruction
E55 Calibration required
E78 Water pressure sensor fault
E83/84/85/86/87 No communication between room controller and boiler
E92 Combustion test alarm during auto-setting
E109 Poor circulation
E110 Boiler overheat tripped
E117 System pressure high (>2.9 bar)
E118 System pressure low (<0.5>
E125 Primary water circulation fault
E128 Loss of flame during operation
E129 Loss of flame during calibration
E130 Flue thermostat sensor tripped (lockout)
E133 Ignition fault
E135 Internal error
E154 Primary flow fault
E160 Fan fault
E270 Dry fire
E317 Wrong power supply (HZ)
E321 Hot water thermistor fault
E384 Flame detected when gas valve off (false flame)
E385 Low voltage (less than 195v)

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