LOCKOUT
If the fault is persistent or more severe the boiler will lockout with a error code.
When the boiler
has entered this error mode it will not attempt to restart until the "Reset" button is pressed.
ERROR CODES
Display
Description of fault
Code Description Our comments
E00
Flame detected when not expected. Check boiler earth and probe condition.
E02
No ignition after restart. Check gas supply, gas valve operation and ignitor
electrode spark generation
E03
Gas valve faulty or not connected
E04
Power has been reset whilst boiler was in lockout
E11
Internal electronics error - rest or replace control box
E12
Thermal fuse blown or flue overheat thermostat activated.
E18
Flow overheat - check water circulation
E19
Maximum return temperature exceeded. Check circulation.
E25
Flow temperature increased too quickly. Check water circulation.
E28
Fan not rotating - check fan connection and fan for fault.
E30
Difference between flow and return temperatures too high. Check circulation. Possible pump failure
E31
Flow thermistor short circuit - check/replace connections/thermistor check for leaks, water causing short circuit
E32
Return thermistor short circuit - check/replace connections/thermistor
check for leaks, water causing short circuit
E36
Flow thermistor open circuit - check/replace connections/thermistor
check for leaks, water causing short circuit
E37
Return thermistor open circuit - check/replace connections/thermistor
check for leaks, water causing short circuit
E44
Low water pressure
Check for leaks check PRV, expansion vessel
BOCK CODES
Code Description Our comments
B18 Flow temperature exceed 95
B19 Return temperature exceeded 95
B24 Return temperature exceeded flow temperature. Check pump direction on boiler
B25 Flow temperature climbing too quickly. Possible air lock or circulation blockage
B26 Low water pressure Check for leaks check PRV, expansion vessel
B28 No signal from fan. Possible fan disconnected or faulty
B29 Incorrect signal from fan. Possible fan faulty
B30 Difference between flow and return temperatures too high. Check water circulation Possible pump failure
B65 Waiting for fan to start