Spare Parts - Saunier Duval THEMA F 23 E Installation And Servicing Instructions

FAULT FINDING
Open hot tap fully.
Does burner fire ?
NO
With selector switch/thermostat
in position and turner to maxi-
mum. Does burner fire for CH ?
YES
Is there at least 3 litres/min
water flow at tap ?
YES
Check operation of water valve
diaphragm. Does reversing
valve mechanism move when
hot tap is opened ?
YES
Is there continuity across DHW
microswitch and PCB
connections cn 6.4 and cn 6.9 ?
YES
Remove leads from boiler
thermistor. Check its resistance
in accordance with thermistor
value table. Is thermistor ok ?
CHART 2
Termistor Values
Temperature ( C)
nominal resistance ( ) for NTC
Temperature ( C)
nominal resistance ( ) for NTC

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
1 Fan
2 Pump
3 Spark generator
4 Air pressure switch
5 Main PCB (SB models)
6 Main PCB (THEMA F 23 E)
NO HOT WATER
(except SB models)
NO
Refer to chart n 2
NO
Check mains water
supply, water filter
NO
Replace
diaphragm
NO
Replace dhw
microswitch
NO
Replace thermistor
Replace main pcb
0 5 10
32565 25345 19875 15700 12500 10000 8060
55 60 65
2989 2490 2085
Part No.
57059
51236
51110
51692
57267
57265
PUMP NOT RUNNING
YES
Is there 240 v at pump ?
NO
Is there 240 v at
terminal cn2 of PCB ?
NO
Replace main PCB
CHART 3
FAN NOT RUNNING
YES
Is there 240 v at fan ?
NO
Replace main PCB
CHART 4
15 20 25 30
70 75 80 85
1755 1480 1260 1070
No. Description
7 Control PCB (all models)
8 Water valve diaphragm kit
9 Microswitch assembly (THEMA F 23 E)51590
10 Temperature/pressure gauge
11 Boiler Thermistor
12 Overheat thermostat
Is pump jammed ?
YES
NO
Replace
Free pump
pump motor
Is fan jammed ?
NO
Replace fan
35 40 45 50
6535 5330 4370 3605
90 95 100
920 785 680
Part No.
57277
52519
57278
57060
51199
27