PowerMax 155x Series User Manual

THE APPLIANCE WILL NOT:
IGNITE THE BURNER
DELIVER HOT PRODUCE WATER CENTRAL
HEATING
DOES THE FLOW SWITCH OPERATE THE HE. PUMP IE 230V AT TERMINAL 23 WHEN THE BURNER IS NOT LIT
IS THE CYLINDER UP TO THE CORRECT TEMPERATURE
YES
CHECK THE BLENDER VALVE. CHECK THE FLOW RATE IS NOT GREATER THAN 121/MIN IF THE FLOW IS POOR CHECK THE INLET STRAINER AND INCOMING WATER SUPPLY CHECK THE FLOW SWITCH RELAY ASSEMBLY, REPLACE IF FAULTY IS THE APPLIANCE/ PROGRAMMER/ROOMSTAT CALLING FOR HEAT IE 230V AT TERMINAL 28
NO
START
NO
CHECK THE BOILER STAT
YES
CHECK THE COLD START STAT (DOMESTIC PRIORITY STAT) IT WILL NOT ALLOW CENTRAL HEATING WHEN THE CYLINDER STORE TEMPERATURE IS BELOW 65°C IF OK CHECK PUMP AND CONNECTIONS AT TERMINAL 25 AND N2
IS ORANGE NEON LIT
NO
IS THERE 230V TO THE UNIT
YES
CHECK CIRCUITRY TO AND AROUND NEON. IF CORRECT REPLACE NEON.
NO
YES
CHECK FOR 230V EITHER SIDE OF FILTER. IF FAULTY REPLACE. CHECK MAINS SUPPLY LEAD/FUSE. REPLACE AS NECESSARY.
DOES THE FAN RUN
NO
IS THERE POWER TO THE FAN
YES
CHECK FAN CAPACITOR AND WIRING FOR FAULT CHECK FOR DAMAGE OR BLOCKAGE TO THE FAN REPLACE CAPACITOR/ REPLACE FAN HAS THE LIMIT STAT TRIPPED TEST FOR AND RECTIFY ANY OVERHEAT FAULT, I.E. DEFECTIVE BOILER STAT
YES
CHECK HEAT EXCHANGER PUMP WORKING AND NOT AIR LOCKED. REPLACE IF FAULTY. CHECK BOILER THERMOSTAT IS CALLING FOR HEAT.
YES
CHECK CIRCUITRY TO FAN FROM IGNITION CONTROLLER. REMOVE IGNITION CONTROLLER AND CHECK INTERNAL FUSE. IF FAULTY REPLACE WITH CORRECT 20mm FUSE, I.E. 2A HRC IF FUSE IS OK REPLACE CONTROLLER.
NO
NO
NO
YES
CHECK IF PROGRAMMER/HEATING SWITCH IS CALLING FOR HEAT. CHECK SWITCH + WIRING FOR 230V BETWEEN SWITCH/PROGRAMMER AND BOILER STAT.
IS THE RED NEON LIT
SWITCH OFF WAIT 10 SECS SWITCH ON
YES
NO
DOES SPARK ELECTRODE SPARK
NO
DOES THE IGNITION CONTROLLER GENERATE A SPARK.
REMOVE THE BURNER AND REPLACE (OR CHECK) ELECTRODE. THE CORRECT SPARK GAP IS 3.5/4.0mm
YES
REPLACE ELECTRODE IF FAULTY (ADJUST ELECTRODE BY MOVING EARTH POST ONLY). PLACE THE ELECTRODE END OF THE HT LEAD ON BURNER. IS A SPARK TO THE BURNER VISIBLE? REPLACE IGNITION CONTROLLER
NO
ENSURE THAT H.T. LEAD IS PROPERLY CONNECTED AT CONTROLLER AND THAT THE WHITE EARTH WIRE IS PUSHED HOME ON THE ELECTRODE EARTH PLATE
NO
YES
IS GREEN NEON LIT
IS GAS PRESENT AT GAS VALVE INLET PRESSURE TEST POINT CHECK GAS IS CONNECTED AND TURNED ON. CHECK FOR OBSTRUCTIONS IN GAS LINE. IS GAS PRESENT AT GAS VALVE OUTLET PRESSURE TEST POINT DURING IGNITION ATTEMPT APPROX 4.5 mbar CHECK FOR 230V AT TERMINAL G1 CHECK OVERHEAT STAT AND WATER LEVEL SWITCH AND RECTIFY FAULT, E.G. REFILL SYSTEM. IF OK CHECK FOR 230V AT PIN 8 (BLACKWIRE) ON THE IGNITION CONTROLLER CHECK FOR FAULT AT GAS VALVE OR AIR SENSE LINE. CHECK FAN PRESSURE IN AIR SENSE LINE IS BETWEEN 4.5 AND 5.2 mbar. CHECK FAN, FLUE WAYS AND INJECTOR HOUSING FOR OBSTRUCTION AND RECTIFY. IF SATISFACTORY CHECK COIL ON GAS VALVE. REPLACE COIL/GAS VALVE AS NECESSARY.
NO
NO
YES
YES
NO
YES
YES
NO
YES
NO
YES
DOES APPLIANCE REMAIN RUNNING
IF STUTTERING IGNITION IS OBSERVED, CHECK ELECTRODE AND CONNECTION AS IN PREVIOUS COLUMNS. IF SMOOTH IGNITION IS OBSERVED BUT BURNER GOES OUT AFTER APPROXIMATELY 3 SECONDS CHECK IGNITION CABLE/ELECTRODE. REPLACE AS NECESSARY. IF IGNITION CABLE AND ELECTRODE OK THEN REPLACE IGNITION CONTROLLER.
NO
CHECK ELECTRODE AS IN PREVIOUS COLUMNS. CHECK ELECTRODE GAP DISTANCE FROM BURNER FACE. IF NOT APPROX. 13mm RECTIFY. TURN OFF GAS AND USE MIRROR TO CHECK FOR STRAY HT SPARKING.
APPLIANCE SATISFACTORY
YES
IS BOILER GAS RATE SATISFACTORY CHECK FLUE PIPES ARE NOT BLOCKED CHECK THAT THE FLUE PIPE IS CORRECTLY CONNECTED TO TERMINAL CHECK THAT THE MAXIMUM LENGTH OF AIR/FLUE PIPES AND BENDS HAS NOT BEEN EXCEEDED
NO
YES
5.0 (155
N
) or 4.0 mbar (140)
4.8.5.5 (155
N
) 3.8.4.4 (140)
CHECK THE BLENDER VALVE. CHECK THE FLOW RATE IS NOT GREATER THAN 12 L/MIN (140) 18 L/MIN (155
N
) IF THE FLOW IS
POOR CHECK THE INLET STRAINER AND INCOMING WATER SUPPLY
4
4.0mbar(140) or 5.0(155
N
)
3.8 - 4.4(140) 4.8 - 5.5(155
N
)mbar
12
Fault finding chart

PowerMax 155x Series Specifications

General

Brand	PowerMax
Model	155x Series
Category	Boiler
Language	English