Technical data

15.0 Fault Finding
47
OVERHEAT LOCKOUT
Replace Stat.
Replace Stat.
Wiring from PCB to
thermostats faulty.
YES
NO
YES
NO
NO
Disconnect
black stat on flow pipe.
When flow < 60° C is there
continuity across stat ?
Replace combustion
chamber door seal & trim
seal.
NO
YES
NO
YES
Reconnect stat.
Disconnect fan stat.
When fan temp < 60° C
is there continuity
across stat ?
Reconnect stat.
Disconnect the larger of
the 6-way PCB connectors.
Is there continuity
across M ?
Disconnect
thermistor
(red sensor on flow pipe).
Is resistance between
0.5kΩ & 20kΩ ?
Is
combustion chamber
door seal damaged or not in
place ?
Replace PCB.
YES
Replace thermistor.
M
6-way Connector
Flash
Off
On
ON
Lights