SLE SLE2000 HFO, Service Manual, Page: 80 / 84

SLE2000 HFO Service Manual
Doc No. SM/0001: Issue 7.0
Page 80 of 84
10. SLE2000 HFO E
LECTRICAL
T
ROUBLESHOOTING
C
HART
Problem Possible Cause Remedy
On power up mains
indicator not illuminated
Battery fail alarm on
continuously.
a) No A.C power
b) No A.C power to
transformer
c) No DC voltages from
PSU pcb (24V, 12V,
5.12V)
Check wall socket
Check : fuses mains filter
on-off switch
Check for short circuits,
otherwise replace PSU and
recalibrate.
"System Fail" Alarm will
not cancel A0702/02 Ventilator CPU
pcb faulty. Replace A0702/02
Ventilator CPU pcb
System repeatedly resetting
with no LCD display LCD ribbon cable on A736
board not connected check LCD ribbon cable
"HELP" message Open circuit analogue
inputs to processor Check potentiometers and
wiring harness. Refer to
wire harness circuit
diagram.
"SOL" message a) Faulty or open circuit
solenoid
b) Faulty BPM range
switch
c) Faulty power supply
d) Harness fault
Check solenoid and replace
if necessary
Replace
Check for short circuits,
otherwise replace PSU and
recalibrate.
Check integrity of harness
wiring. Refer to circuit
diagram.
Ventilator powers up, but
does not cycle in CMV
mode and no audible or
visual alarms. Absence of 5.12V dc If voltage is absent then
check for short circuits,
otherwise replace PSU and
recalibrate.
“HFO Fail” LED and
audible alarm Harness fault
Motor drive board failure
Motor failure
Check wire harness. Refer
to wire harness circuit
diagram.
Replace A0739/01 board
Replace.