IDEAL LOGIC+ SYSTEM2 S15 User Manual

52
Installation and Servicing
Section 4 - Fault Finding
FAULT FINDING
4.8 FLOW THERMISTOR FAULT
4.9 RETURN THERMISTOR FAULT
Pump Housing
Check the resistance using a suitable multimeter
connected across the thermistor’s terminal pins.
Temperature Resistance kΩ
25
o
C 9.7 – 10.3
60
o
C 2.4 – 2.6
85
o
C 1.0 – 1.1
Is the Thermistor value correct?
YES
Is there continuity between the PCB and the Thermistor?
YES
Replace PCB
Fit a new Thermistor
NO
Check and replace wiring as necessary
NO
Disconnect the wiring from the Flow Thermistor
Check the resistance using a suitable multimeter connected
across the Thermistor’s terminal pins.
Temperature Resistance kΩ
25
o
C 9.7 – 10.3
60
o
C 2.4 – 2.6
85
o
C 1.0 – 1.1
Is the Thermistor value correct?
YES
Is the wiring securely connected to the low voltage 6 way
connector at the front left hand side of the PCB?
YES
Replace PCB
Fit a new Thermistor
NO
Securely connect the wiring to the PCB
Is the wiring securely connected to the Flow Thermistor
Located in the Flow Pipe lower LHS of Boiler
YES
NO
Securely connect the wiring to the Flow
Thermistor
NO

IDEAL LOGIC+ SYSTEM2 S15 Specifications

General

Brand	IDEAL
Model	LOGIC+ SYSTEM2 S15
Category	Boiler
Language	English