Instruction Manual
IM-106-350, Rev 2.2
July 2008
8-11
Oxymitter 5000
Figure 8-7. Fault 5, Open Heater
Fault 5, Open Heater
Figure 8-7 shows the electronic assembly for an
Oxymitter 5000 with a membrane keypad (upper
view) and a Oxymitter 5000 with an LOI (lower
view).
Membrane Keypad
When Fault 5 is detected, the HEATER LED
flashes once, pauses for three seconds, and
repeats.
1. Remove power.
2. Remove the electronic assembly per
"Electronic Assembly Replacement" in
Section 9: Maintenance and Service.
3. Using a multimeter, measure the resistance
across the terminals of heater connector,
J8.
4. The measurement should be approxi-
mately 72 ohms. If the heater is open, see
"Heater Strut Replacement" in Section 9:
Maintenance and Service.
LOI
When Fault 5 is detected, the LOI displays the
"O2 Heater Open" message.
1. Remove power. Unscrew and remove the
LOI module from the electronic assembly.
2. Perform the diagnostic steps 2 through 4
shown for the membrane keypad.
38730076
LOI
KEYPAD
Alarms
O2 Heater Open
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATER T/C
HEATER
O2 CELL
CALIBRATION
CALIBRATION RECOMMENDED
O2 CELL mV +
O2 CELL mv -
HEATER T/C +
HEATER T/C -
INC
INC
DEC
DEC
HIGH
GAS
LOW
GAS
CAL
TEST GAS +
PROCESS -
% O2
SW2
TP1
J1
TP2
TP3
RED
YEL
GRN
ORG
TP4
TP5
TP6
ON
Summary of Contents for Oxymitter 5000
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Page 22: ...Oxymitter 5000 xii Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 42: ...Oxymitter 5000 1 20 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 62: ...Oxymitter 5000 2 20 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 74: ...Oxymitter 5000 4 6 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 78: ...Oxymitter 5000 5 4 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 94: ...Oxymitter 5000 7 6 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 140: ...Oxymitter 5000 9 22 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 184: ...Oxymitter 5000 B 2 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 204: ...Oxymitter 5000 D 14 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 222: ...Oxymitter 5000 E 18 Instruction Manual IM 106 350 Rev 2 2 July 2008 ...
Page 224: ...Instruction Manual IM 106 350 Rev 2 2 July 2008 Index 2 Oxymitter 5000 ...