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Technical data

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110664A 06/98
SPARE PARTS
When ordering spare parts, quote the part number and description, stating the appliance model number
and serial number from the data badge.
Short parts list
No. Description Part No.
1 Fan 57059
2 Pump 51236
3 Spark generator 51110
4 Air pressure switch 51692
5 Main PCB 57286
No. Description Part No.
6 Control PCB 57296
7 Water valve diaphragm kit 52519
8 Microswitch assembly 51590
9 Pr essure gauge 57278
10 Boiler Thermistor 57060
11 Overheat thermostat 51199
NO HOT WATER
Replace main pcb
Refer to chart n°2
Check mains water
supply, water filter
Is there at least 3 litres/min
water flow at tap ?
Remove leads from boiler
thermistor. Check its resistance
in accordance with thermistor
value table. Is thermistor ok ?
Check operation of water valve
diaphragm. Does reversing
valve mechanism move when
hot tap is opened ?
Replace
diaphragm
Replace thermistor
Open hot tap fully.
Does burner fire ?
YES
NO
NO
YES
YES
NO
With selector switch/thermostat
in position and turner to maxi-
mum. Does burner fire for CH ?
Is there continuity across DHW
microswitch and PCB
connections cn 6.4 and cn 6.9 ?
YES
Replace dhw
microswitch
Is there 240 v at pump ?
YES
Is there 240 v at
terminal cn2 of PCB ?
Is there 240 v at fan ?
NO
YES
CHART 2
NO
NO
NO
CHART 3
PUMP NOT RUNNING
FAN NOT RUNNING
Replace main PCB
YES
CHART 4
NO
NO
Is pump jammed ?
Replace
pump motor
NO
Free pump
Is fan jammed ?
Replace fan
NO
Temperature (°C) 0 5 10 15 20 25 30 35 40 45 50
nominal resistance (Ω) for NTC 325652534519875157001250010000 8060 6535 5330 4370 3605
Temperature (°C) 55 60 65 70 75 80 85 90 95 100
nominal resistance (Ω) for NTC 2989 2490 2085 1755 1480 1260 1070 920 785 680
Termistor Values
YES
SERVICING INSTRUCTIONS
Is there 240 V on tracks
13.2/13.3 on ignition
P.C.B. ?
YES
Faulty wiring or plug
Is there continuity on
tracks 14.3/14.4 on
ignition P.C.B. ?
Check plug connector
Check O/H stat
Reset or replace
Is there open circuit on
tracks 14.5/14.6
Replace ignition P.C.B.
NO
YES
YES
NO
Check plug connector
Check A.P.S.
Free or replace
NO