Go to
MAINS LED OFF
section of the fault finding
instructions.
YES
NO
Mains LED
off ?
14.0 Fault Finding
36
Mains LED
flashing ?
Lockout LED
flashing 5 times a
second ?
Lockout LED
flashing once a
second ?
Lockout LED
continuously
on ?
Fan not running
Lockout will
not reset ?
Go to
MAINS LED FLASHING
section of the fault finding
instructions.
Go to
DRY-FIRE LOCKOUT
section of the fault finding
instructions.
Go to
SAFETY LOCKOUT
section of the fault finding
instructions.
Go to
IGNITION LOCKOUT
section of the fault finding
instructions.
Go to
NO FAN
section of the fault finding
instructions.
Go to
NO LOCKOUT RESET
section of the fault finding
instructions.
YES
NO
YES
NO
YES
Lockout
LED flashing once
every 4 seconds ?
Go to
THERMISTOR
OPEN CIRCUIT
section of the fault finding
instructions.
YES
NO
NO
YES
NO
YES
NO
YES
HIGH
LOW
Overheat or
Lockout (Red)
Boiler On
(Yellow)
Mains On
(Green)
Control
Knob
Please Check Following Points Before
Going Through The Fault Finding Chart.
- Check electrical system earth continuity,
short circuit, resistance to earth, fuse failure
and a minimum voltage of 195 is present at
input connections on boiler, check internal
fuse is OK, unit is not in lockout.
- There is an adequate gas supply pressure
at the inlet. A minimum pressure of 18.1 mb
is required at the inlet.
- All isolating valves are open and both the
boiler and the system are vented.
- Check installation is correct, including the
flue system.
Summary of Contents for 100 He
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