49
H
J
K
2
Overheat thermostat operated or
faulty.
Check for and correct any system
faults (water circulation).
NO
�I
Allow to cool. Continuity
across thermostat terminals
more than 1.5 ohm
� Replace safety thermostat
'---------------'
NO
Check Flow, Return,
sensors. See section 'D'
YES
CH system pressure less than
7.25 psi or more than
4
3 psi.
Restore System Pressure
NO
Ensure correct circulation of
the pump
YES
YES
Check wiring and pcb connection at
connector x22 is there approx. 5 V
DC between the green and black
NO
terminals
Check flow temperature sensor connections
and position. Sensors swapped.
Cold resistance approximately.
1 OkO @ 77' F (CH sensors)
(resistance reduces with increase in temp.)
YES
I
• I
.I
I
Is E11 O is still flashing
Replace pressure sensor
Replace PCB
I
Replace sensor
Go to section 'B'
Is there 120V at:
PCB connector x13 3 way valve terminals
Blue to Black central heating mode
Blue to Brown domestic hot water mode
See Wiring Diagram
YES
Replace PCB
Check 3 way valve cable.
Motor, 3 way valve
Replace motor 3 way valve
Replace PCB
I
FAULT SOLUTION SECTIONS
PN 240012875 REV. C [10/01/2021]
Содержание MACF-115
Страница 2: ...MACF 150 ...
Страница 4: ...MAHF 125 ...
Страница 74: ...70 A 1 MODEL 100 Heat Only APPENDIX A WIRING DIAGRAMS 240013371 REV B 10 01 2021 ...
Страница 75: ...71 A 2 MODEL 125 Heat Only APPENDIX A WIRING DIAGRAMS 240013371 REV B 10 01 2021 ...
Страница 76: ...72 APPENDIX A WIRING DIAGRAMS A 3 MODEL 165 Heat Only 240013371 REV B 10 01 2021 ...
Страница 77: ...73 APPENDIX A WIRING DIAGRAMS A 4 MODEL 115 Combi 240013371 REV B 10 01 2021 ...
Страница 78: ...74 A 5 MODEL 150 Combi APPENDIX A WIRING DIAGRAMS 240013371 REV B 10 01 2021 ...
Страница 79: ...75 A 6 MODEL 205 Combi APPENDIX A WIRING DIAGRAMS 240013371 REV B 10 01 2021 ...
Страница 80: ...76 NOTES 240013371 REV B 10 01 2021 ...
Страница 81: ...77 NOTES 240013371 REV B 10 01 2021 ...
Страница 82: ...78 NOTES 240013371 REV B 10 01 2021 ...
Страница 117: ...33 MODEL 100 Heat Only 100 HEAT ONLY WIRING DIAGRAM PN 240012875 REV C 10 01 2021 ...
Страница 118: ...34 MODEL 125 Heat Only 125 HEAT ONLY WIRING DIAGRAM PN 240012875 REV C 10 01 2021 ...
Страница 119: ...35 MODEL 165 Heat Only 165 HEAT ONLY WIRING DIAGRAM PN 240012875 REV C 10 01 2021 ...
Страница 120: ...36 115 COMBI WIRING DIAGRAM MODEL 115 Comb PN 240012875 REV C 10 01 2021 ...
Страница 121: ...37 MODEL 150 Combi 150 COMBI WIRING DIAGRAM PN 240012875 REV C 10 01 2021 ...
Страница 122: ...38 MODEL 205 Combi 205 COMBI WIRING DIAGRAM PN 240012875 REV C 10 01 2021 ...
Страница 127: ...43 LOW WATER CUTOFF DETAIL LOW WATER CUTOFF NO NO YES PN 240012875 REV C 10 01 2021 ...
Страница 132: ...48 3 FAULT SOLUTION SECTIONS PN 240012875 REV C 10 01 2021 ...
Страница 135: ...51 Parameter ID Changed From Changed To Date Reason PARAMETER CHANGE HISTORY PN 240012875 REV C 10 01 2021 ...