
5.
Trouble-shooting
Neptune_GB_Ver.2.0_10/03
Display
Symptom
Cause
Outer
Inner
Check
Error codes
Ho S
t
afety temperature switch B3
opens when temp. is higher than
106 C (222 F).
°
°
Wire defective
Use of long hoses at
steam with leaky
valves.
Flow and pressure
switch out of
adjustment.
Oil residue in heat
exchanger.
Heat exchanger
security adjustment.
Switch B3 must be
changed if open.
Detergent valve.
Wire defective.
Spark failure.
Oil filter blocked
soot on glass
P
O L
ump
il ow
Switch B6 open
Wire defective.
Oil seals worn out
B6 switch
L h
L
ig t sensor B7 sees ight,
when Y1 is not activated
Flame sensor short circuit
(Cold water operation, not possible)
Sensor not in place.
Wire defective.
Oil residue in heat
exchanger is burning.
Y1 Leaky.
Ignition failure.
Oil pressure.
Nozzle
Electrode
Flame sensor
Ho M
P
t
otor
rotector
Motor winding > 160 C(320 F)
°
°
Pump pressure too
high.
Temp in room > 40
C (104 F)
°
°
Fan on motor
defective.
Fuse (F1)
Sensor in
windings.
Fl
F
ow ailure
Flow switch B2 closed and B4 open.
Wire defective
Reed switch.
No ig t, Fuel
nabled.
Light sensor B7 sees no flame
when Y1 is open.
L h
E
Flow switch off.
Fuse (F11).
Sensor B7.
Fu
E
el
mpty.
Level switch B9 Open.
Wire defective
Lea
kage.
Three times start without flow.
Leaky system.
Leaky non-return
valve.
Micro ro essor failure.
p c
Water in electric
system
Temperature
nsor (B1)
pen.
Se
O
Wire defective.
Temperature
nsor (B1)
losed
Se
C
Wire defective.
Fl
ow switch open (B2) and
microswitch (B4) close.
Air in suction water.
No water.
26.
Flow piston hanging
B4 switch
Содержание Neptune 5
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