Honeywell Home HM750A1000 Instructions D'installation page 26

HM750A1000
Service LED Symptom
Fault 3 Insufficient
flashes Current
Fill valve activated
for long time, but
high water level not
reached.
Fill should be
faster than 1 in. per
minute.
Fault 4 PCB Error
flashes
Fault 5 Wrong Voltage
flashes Selection
33-00289EF—05
Cause
Cylinder plugs installed incorrectly Check that cylinder plugs are completely seated
Fill valve inlet filter clogged
The control board detects current
draw when the humidifier is in
standby mode.
VOLTAGE SELECTION jumper on
control board is incorrectly set.
26
Corrective Action(s)
on cylinder.
Check fill valve inlet filter and clean if required.
Replace circuit board.
If 240VAC is supplied to the humidifier, but the
VOLTAGE SELECTION jumper is set to 120VAC,
the control board will fail and need to be
replaced.
If 120VAC supplied to the humidifier, but the
VOLTAGE SELECTION jumper is set to 240VAC,
the 5 flash fault will occur. Correct the VOLTAGE
SELECTION jumper and re-start humidifier.