| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | |
| | | FAULT FINDING | | |
| | | |
| | | PUMP NOT RUNNING | | |
| | | NO HOT WATER (except SB models) NO | | |
| | | Open hot tap fully. Does burner fire ? | | |
| | | |
| | | | YES | | |
| | | |
| | | Is pump jammed ? | | |
| | | Is there 240 v at pump ? | | |
| | | NO | | |
| | | |
| | | | |
| | | Ino | | |
| | | Ï | | |
| | | YES | |
| | | NO | | |
| | | With mum | selector switch/thermostat position and turner to maxi-| Does burner fire for CH ? | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | Is there 240 v at terminal cn2 of PCB ? | | |
| | | Replace pump motor | | |
| | | Refer to chart n°2 | | |
| | | Free pump | | |
| | | |
| | | |
| | | |
| | | |
| | | NO | | |
| | | YES | | |
| | | |
| | | NO | | |
| | | |
| | | Replace main PCB | | |
| | | |
| | | | | |
| | | Is there water | | least 3 litres/min flow at tap ? | | |
| | | |
| | | |
| | | |
| | | CHART 3 | | |
| | | YES- | | |
| | | |
| | | NO | | |
| | | |
| | | |
| | | Replace diaphragm | | |
| | | Check operation of water valve diaphragm. Does reversing valve mechanism move when hot tap is opened ? | | |
| | | |
| | | |
| | | YES | | |
| | | NO | | |
| | | |
| | | |
| | | FAN NOT RUNNING | | |
| | | Replace dhw microswitch | | |
| | | Is there | | continuity across DHW
| | |
| | | |
| | | |
| | | microswitch and PCB connections cn 6.4 and cn 6.9 ?| | | |
| | | |
| | | YES Ih | | |
| | | Is fan jammed ? | | |
| | | Is there 240 v at fan ? | | |
| | | |
| | | | |
| | | YES | | |
| | | NO | | |
| | | |
| | | |
| | | |
| | | Remove leads from boiler thermistor. Check its resistance in accordance with thermistor value table. Is thermistor ok ? | | |
| | | Replace thermistor | | |
| | | Replace fan | | |
| | | Replace main PCB | | |
| | | |
| | | |
| | | |
| | | CHART 4 | | |
| | | |
| | | |
| | | Replace main pcb | | |
| | | |
| | | CHART 2 | | |
| | | |
| | | Termistor Values | | |
| | | |
| | | Temperature (°C) 0 5 10 15 20 25 30 35 40 45 50 nominal resistance (Q) for NTC 32565 25345 19875 15700 12500 10000 8060 6535 5330 4370 3605 Temperature (°C) 55 60 65 70 75 80 85 90 95 100 nominal resistance (Q) for NTC 2989 2490 2085 1755 1480 1260 1070 920 785 680 | | |
| | | |
| | | 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. | No. | Description Part No. | | | | 1 | Fan | 57059 | 7 | Control PCB (all models) 57277 | | | | 2 | Pump | 51236 | 8 | Water valve diaphragm kit 52519 | | | | 3 | Spark generator | 51110 | 9 | Microswitch assembly (THEMA F 23 E)51590 | | | | 4 | Air pressure switch | 51692 | 10 | Temperature/pressure gauge 57278 | | | | 5 | Main PCB (SB models) | 57267 | 11 | Boiler Thermistor 57060 | | | | 6 | Main PCB (THEMA F 23 E) | 57265 | 12 | Overheat thermostat 51199 | | | | | | | | | | | | |
| | | |
| | | J | | |
| | | |
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