Return Thermistor Fault; Fan Fault; Low Water Pressure; No Water Flow - IDEAL Vogue System Gen 2 S15 Installation And Servicing

4.9 RETURN THERMISTOR FAULT

Disconnect the electrical connection to the
Return Thermistor and check the resistance
using a suitable multimeter connected across the
At 25°C expect 9,700 - 10,300 Ω
At 60°C expect 2,400 - 2,600 Ω
At 85°C expect 1,000 - 1,100 Ω
Is there continuity in the wiring from the primary PCB to
the Thermistor? (8 way connector, connections 5 and

4.10 FAN FAULT

Does the wiring from the Fan to the PCB have
secure connections at both ends and has not
Is there 240Vac at the blue and brown connections to
the 3 way connection on the Fan?

4.11 LOW WATER PRESSURE

Are the boiler and CH system filled with water and
all Isolation and Radiator Valves open?
Does the wiring from the Water Pressure Switch to the
PCB have continuity and is it securely connected?

4.12 NO WATER FLOW

Are the boiler and CH system filled with water and
all Isolation and Radiator Valves open?
Does the mains wiring from the Pump to the main PCB
have continuity and is it securely connected (6 way
64
SECTION 4 - FAULT FINDING
thermistor's terminal pins.
Is the thermistor value correct?
Yes
6, black and red)
deteriorated?
Yes
Yes
Yes
Replace Water Pressure Switch
Yes
connector X2)?
Yes
Is there 230V to the Pump?
Yes
Replace Pump
No
Fit a new thermistor
No
Replace wiring from flow thermistor to
primary PCB
Yes
Replace primary PCB
No
Rectify wiring & connections
No
Replace main PCB
Yes
Replace Fan
No
Fill and vent the system and open
all Isolation Valves
No
Ensure wiring has continuity and is
securely connected
No
Fill and vent the system and open all
Isolation Valves
No
Ensure wiring has continuity and is
securely connected
No Replace Main PCB
Installation and Servicing