English
5.906-432.0 Rev. 00 (06/15)
119
Note
One display for multiple faults is used here. By reading the
fault memory, the fault can possibly be localized. (Service
mode 70°C)
9.2
Error message with service demand
Display
Explanation
Remark
Water shortage safeguard (reed switch or magnetic piston is
sticky).
Check water shortage safe
guard.
10 short startups/leakage.
Rectify leaks in the HP sys-
tem.
Contactor does not switch.
Check contactor.
Check installation of the cur-
rent transformer.
This fault is not saved.
Water temperature sensor (NTC) defective.
Check NTC.
Cable NTC scraped blank or
interrupted.
Flame sensor detects condition that is not permitted.
Possible causes:
–
Fuel solenoid valve
–
Fuel line/filter
–
Stray light
–
Sight glass sooted
–
Combustion chamber
scaled
–
Fuel empty and fuel
empty message defec-
tive
RFID write-read electronics defective.
Check connection to the
RFID write-read electronics.
Содержание HDS 7/12 M
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