Potterton Powermax HE 115, Installation And Servicing Instructions, Page: 67 / 68

Publication No. 5106228
7 User’s Instructions
Basic Troubleshooting
Boiler not working
• Are all the gas and water supplies turned on at
the main supply ?
• Is the electricity supply on and is the amber neon
lit underneath the Boiler On/Off Switch ?
• Is the programmer set to an ‘On’ period for central
heating and are any other controls such as room
thermostat and thermostatic radiator valves set
to their maximum on settings ?
Programmer not working
• No Display (boiler switched 'On') - Check the
mains electricity supply to the boiler is ON (the
amber neon underneath the Boiler On/Off Switch
will be lit). If not, check the fuse at the plug or
switched socket.
• Display only shows Clock - Has your installer
fitted a programmer away from the boiler, if so, the
built in programmer will be disabled and only
display the clock. Refer to Page 21 of the
Installation & Servicing Instructions.
MAX0055C
DISPLAY INFORMATION / FAULT ACTION FURTHER ACTIONS
P 0.1 - 0.4 bar Loss of pressure in heating system Replenish CH system & purge air Find leak(s) and repair
P 0.5 - 0.9 bar Water pressure in CH system low Replenish CH system & purge air Find leak(s) and repair
P 1.0 - 2.9 bar Normal pressure, system warm/hot O.K.
P 3.0 - 3.5 bar Pressure too high, boiler off Reduce CH system pressure * Check/replace expansion vessel
U 60 DHW temperature selected (by knob)
c 80 Indicative flow temperature to CH O.K. Scroll to pressure display "P" Press RESET button to scroll display
t 80 Indicative flow temperature to DHW O.K. Scroll to pressure display "P" Press RESET button to scroll display
b 52 Indicative cylinder temperature O.K. Cylinder being re-heated Press RESET button to scroll display
0 00
Boiler in standby mode O.K.
A 01
Burner failed to light Check gas is on, Press RESET button Check condensate outlet is not blocked
A 02
System response fault Open radiator valves if shut, press RESET If repeated, call Powermax service
A 03
Over temperature lock-out Switch off boiler for 10 minutes Check/replenish system pressure & purge air
A 04
Overheat 'stat open/gas valve failure Press RESET button * Check system pressure & gas valve operation
A 05
Relay failure (control) Switch electricity off - on. Press RESET If repeated, call Powermax service
A 07
Heat exchanger response fault Check gas is on, Press RESET button If repeated, call Powermax service
A 09-12
Internal boiler control failure Switch electricity off - on. Press RESET If repeated, call Powermax service
A 15
Loss of pressure in system Check/replenish system pressure Find leak(s) and repair. Press RESET
A 18
Control / sensor failure Switch off boiler Call Powermax service
A 19
Flame detection / gas valve fault Switch off boiler * Check/replace gasvalve, press RESET
A 20 Flame detected with closed gasvalve Switch boiler off - on. Press RESET If repeated, call Powermax service
A 33 Fan speed incorrect Switch boiler off - on. Press RESET If repeated, call Powermax service
A 40 System response fault Open radiator valves if shut, press RESET If repeated, call Powermax service
E 03 Flow temperature abnormally high Switch off boiler for 10 minutes Check / replenish system pressure & purge air
E 04 Flow sensor open circuit Check connections at control * If repeated, renew sensor/cable
E 06 Flow sensor short circuit Check wires not damaged * If repeated, renew sensor/cable
E 07 DHW sensor open circuit Check connections at control If repeated, renew DHW sensor/cable
E 08 DHW sensor short circuit Check wires not damaged If repeated, renew DHW sensor/cable
E 13/16/19 Internal boiler control error Switch electricity off - on. Try re-starting If repeated, call Powermax service
E 20 Premature flame signal Switch off boiler for 10 minutes Check condensate outlet not blocked
E 21 Live & Neutral supply reversed Correct the electrical supply
E 22 Electrical supply not 50Hz Correct the electrical supply
E 29 Boiler circuit fault Switch electricity off - on. Try re-starting If repeated, call Powermax service
E 40
Return sensor open circuit Check sensor connections * If repeated, renew sensor or cable
E 41
Return sensor short circuit Check wires not damaged * If repeated, renew sensor or cable
E 42
Internal boiler control error Switch electricity off - on. Try re-starting If repeated, call Powermax service
* Work to be performed by Baxi Potterton/Corgi technician only
Adjust if required - 55¡ C recommended Range: 65¡ C (winter) / 45¡ C (summer)
• No Central Heating or Hot Water - Is the
programmer set correctly for current time, day,
programme times etc ? For central heating, are
any room thermostats or thermostatic radiator
valves in the system calling for heat ?
• Incorrect Time & Day Displayed - Set the
correct time and day as shown on Page 6.
• ADVANCE Button Not Working - ADVANCE
Button will not function if central heating is set to
OFF.
Above are the basic items you the user can check
and remedy, if you call out a Potterton service
engineer and the fault is one of those listed above
you will be charged for the visit.
C.H. System Pressure
• Even a very small leak of water from the heating
circuit will cause the status display to flash ‘P 0.9’.
If left and the pressure drops below 0.5 bar, the
boiler will shut down as a safety precaution and
the status display will show ‘P 0.4’ or 'A 15'.
• If the pressure indicated at normal working
temperatures (80 °C) shows ‘P 3.1 or higher,
switch off the boiler and contact your service
engineer.