Hamworthy Warmwell 120, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD WARMWELL 500001091/F
Figure 12.2b Fault Finding Procedures (Cont.)
Does the burner light at Low
Fire ?
Is there a demand for High
Fire ? Neon N8 illuminated
on main PCB.
E
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Continued
No
No
No
No
No
No
Is the flame signal from the
probe above the minimum
(0.7uA) ?
Is there power at the
gas valve ?
Is there a demend from
the thermostat ?
Turn the thermostat to
maximum.
Replace the gas valve
Does the boiler operate at
High fire ?
Is the High/Low link fitted,
terminals (3 - 4)CN16 ?
Has High Fire airflow been
detected ? Neon N12
illuminated on main PCB.
E
Replace the gas valve
Is there power at the High
Fire gas valve solenoid ?
Check the probe wiring
Check the gas valve
plug and wiring
Check C16 terminal
wiring. Check B.E.M.S
load requirements
N
Check gas valve plug and
wiring to main PCB Cn12.
Check High Fire Air
Pressure Switch,
electrical connections and
sensing tubes.
Temperature control circuit
faulty
Boiler at high fire but
cycles on/off rapidly.
Yes
Poor water circulation
Yes
Check/replace temperature
sensor and/or boiler PCB
Check/replace pump, bleed
trapped air from the system
Yes
Insufficient water circulation
Boiler at high fire but
overheats while system
remains cool
Yes
Check/replace pump, bleed
air from system
Yes
Temperature control set
too high
Insufficient water circulation
Boiler at high fire but
operates noisily.
Yes
Adjust temperature control
to a lower setting
Check/replace pump, bleed
air from the system
Yes
Yes
Temperature control circuit
faulty
Check/replace temperature
sensor and/or boiler PCB
Yes
Scale build up in boiler
waterways.
Descale boiler
Yes
Gas control valve faulty
Check/replace gas valve
Yes
Boiler gas setting pressure
incorrect
Check/adjust gas pressure
at manifold
Yes
No
No
No
Boiler operates
satisfactorily
35