E
Troubleshooting
33
NEPTUNE 5 FA_EN_Ver.2.0_25/11
Below there is a list of the actual detectable errors with the belonging
code.
The codes „SEO“, „SEC“, „LHE“ and „FLF“ only occure in Hotwater operation.
Error describtion
Code
Display
Error micro-processor
( uProcessor )
UPC
Temp-sensor closed (Short circuit)
( Sensor closed )
SEC
Temp-sensor open
( Sensor open )
SEO
Flow sensor for start open / flow-sensor for hot
water closed
( Flow failure )
FLF
Flow sensor open while motor is running
( Flow problem or less water)
FLO
Leakage (detect. by micro-sw. / flow-sens.)
( Leakage )
LEA
Safety temperature switch open
( Hot safety temp-switch)
HOS
Pumpoil-switch open ( LED indication )
( Pump oil error )
POL
Light indication burner with fuel disabled
( Light, fuel not activated)
LHL
No light indication burner with fuel enabled
( No light, fuel enabled )
LHE
Fuel-level switch open ( LED indication )
( Fuel empty )
FUE
Thermal protector motor open
( Hot motor protector )
HOP
Summary of Contents for NEPTUNE 5 FA
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