Baxi Solo 2 PF Schnellstart Benutzerhandbuch PDF herunterladen (Seite 42)

12.0Fault Finding

42

START

Replace fan

Replace harness

Replace pressure

switch

Replace fan

Replace

thermostat

Does fan run ?

Is

there a clear

constant spark at

the electrode ?

Change

potentiometer

Is

there mains voltage

at S/L input ?

Is

there mains voltage

at Pump L output ?

Check fuse on

circuit board

Check pump wiring

Note: This can occur if

the boiler has

overheated

Reset by turning

control knob OFF, wait

10 seconds then turn

ON

Does

lockout light

go out ?

Is

"Fan On"

light on ?

Check control knob

is turned on

Check that the wires

are connected to the

thermostat sensor

Check that the fan &

pressure switch plug is

connected

Is there

continuity between

C & NC terminals

on the pressure

switch ?

Check pressure switch

pipes for leaking or

blockage

Note: Under cold

conditions fan run up

time may exceed

1 min

Ensure external

controls are calling

for heat

Does pump run ?

Is

"Pilot On"

light on ?

Is

lockout light

on ?

Is

"Boiler On"

light on ?

Is

there mains voltage

at P/L input ?

Is

there mains at

the fan

connection ?

Is there

continuity across

the overheat

thermostat ?

YES

NO

YES

YES

YES

YES

YES

NO

YES

YES

NO

NO

NO

NO

NO

YES

YES

YES

NO

NO

NO

NO

YES

NO

No continuity - change

sensor

Check continuity

across pilot solenoid

(1.5 K OHM)

No continuity - change

pilot solenoid

Check continuity

across sensor

(1 M OHM at 20

o

C)

Investigate

pump

Change PCB

No continuity

across fuse,

change fuse

YES

YES

Change PCB

Check & clean

electrode. Check gap &

lead

YES

Check external

wiring

NO

Check Potentiometer

(see table)

Before starting FAULT FINDING carry out

preliminary electrical system checks i.e.

Earth Continuity, Polarity, Short Circuit

and Resistance to Earth.

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