Diagnostic Codes - Potterton Powermax HE 85 Litre Installation And Servicing Instructions

DISPLAY MESSAGE
CODE
(INFORMATION / FAULT)
A 01 Burner failed to light
A 03 Over temp. lock-out or circulation failure
A 04 Overheat 'stat open/gas valve failure
Safety relay failure (in boiler control)
A 05
Heat exchanger monitoring fault
A 07
A 15 CH pressure loss/pressure sensor faulty.
Flame detected after gas valve shut
A 19
A 20 Flame detected during ignition cycle
A 33 Fan speed incorrect
System response fault
A 40
A 41 System flow fault
Indicative cylinder temperature
b 52 ¡C
c 80 ¡C Indicative flow temperature to CH
Primary pressure too high
E 01
Flow temperature abnormally high
E 03
E 04 Flow sensor open circuit
E 06 Flow sensor short circuit
DHW sensor open circuit
E 07
E 08 DHW sensor short circuit
E 20 Flame detected with closed gas valve
Live & Neutral supply reversed
E 21
Electrical supply not 50Hz
E 22
E 29 Fault in link on 6-way plug J11
E 40 Return sensor open circuit
Return sensor short circuit
E 41
E 42 Internal control error
(bar) Boiler off because pressure too low
P 0.1 - 0.4
(bar) Water pressure in CH system low
P 0.5 - 0.9
P 1.0 - 2.9 (bar) Normal pressure, system warm/hot
P 3.0 - 3.5 (bar) Primary pressure over 3 bar, boiler off
t 80 ¡C Indicative flow temperature to DHW
U 60 ¡C DHW temperature selected (by knob)
Other codes not listed above indicate a faulty boiler control
ACTION / REMEDY
Check gas supply and gas valve operation
Clean or replace ionisation probe & lead
Check pump, 3-way valve & CH water pressure
Check wires/re-set 'stat. Test valve coils.
Switch OFF/ON - press RESET
Check/adjust gas valve differential (page 42)
Test combustion at high and low input (page 42)
Check/replenish CH system pressure. Find leaks.
Relight, check gas valve closes promptly
Check gas valve closes fully. Replace
Check fan wiring and connections
Check pump operation and speed setting
Check by-pass and other water valves open.
Check pump operation and speed setting
O.K. Cylinder being re-heated
O.K. Scroll to pressure display "P"
Reduce CH system pressure
Check pump, 3-way valve & CH system pressure
Check cable/connections not damaged
Check cable/connections not damaged
Check cable/connections not damaged
Check cable/connections not damaged
Check ionization probe/cable
Correct the electrical supply
Correct the electrical supply
Replace (pressure sensor) cable assy.
Check cable/connections not damaged
Check cable/connections not damaged
Switch OFF/ON at mains isolator
Replenish CH system & purge air
Replenish CH system & purge air
O.K.
Reduce CH system pressure
O.K. Scroll to pressure display "P"
Adjust if required - 55¡C recommended
FURTHER ACTIONS
Check fan and spark operation. Check flue for blockage
Check condensate outlet not blocked & vent tube is clear
Replenish system & purge air/water via manual vent
Test for 230V and Neutral at PCB & plug on gas valve
Replace boiler control Part No. 5107535
Clean/replace ionisation probe & lead Part No. 5106941
Check boiler control responds to flow & ret.sensors
Check/replace pressure transmitter and cable.
Check for electric mains problem. Replace gas valve
Check ionisation probe & condensate outlet
Replace fan Part No. 5106068 or boiler control
Check 3-way valve operation. Purge air from H/E
Check boiler control responds to flow & ret.sensors
Check by-pass isolating valve is open
Press RESET button to scroll display
Press RESET button to scroll display
Check/adjust/replace primary expansion vessel 5106287
Replenish system, adjust pump speed & bleed air
Renew sensor/cable. Check connections on control
Renew sensor/cable. Check connections on control
Renew DHW cable /sensor assy. Part No. 5106290
Renew DHW cable /sensor assy. Part No. 5106290
Check condensate outlet not blocked & vent tube clear
Part No. 5107534
Renew sensor/cable. Check connections on control
Renew sensor/cable. Check connections on control
Replace boiler control Part No. 5107535
Find leak(s) and repair.
Find leak(s) and repair. Compare analogue gauge pressure.
Check/adjust/replace primary expansion vessel
Press RESET button to scroll display
Range: 65¡C (winter) - 45¡C (summer)
MAX0062D