Mobile Generator
Output Voltage Troubleshooting
wc_tx000726gb.fm
75
8.7
Checking the AVR Sensing Wires
Prerequisites
Generator shut down
Procedure
Follow the procedure below to check the AVR sensing wires.
1. Open the large hinged panel and locate the Engine Control Module (ECM) and the Auto-
matic Voltage Regulator (AVR).
2. Disconnect the 4-pin connector (it has 3 wires) from the ECM.
3. Remove the green and black wires from the AVR.
4. Measure the resistance across the green and black wires.
Is 0.2–1.0 Ohms measured?
5. Measure the resistance between the green wire and the ground lug. Also check
between the black wire and the ground lug.
Is 0.2–1.0 Ohms measured?
6. Remove the bus bar between the neutral lug and the ground lug.
7. Measure the continuity between the green wire and the ground lug. Also check between
the black wire and the ground lug.
Does each wire measure “OPEN” or “OL” to the ground lug?
8. Reconnect the 4-pin connector and the green and black wires to the AVR.
NOTICE: NEVER run the generator when the green and black wires are disconnec-
ted from the AVR and all other wires are connected to the AVR.
Damage to the gen-
erator will occur.
9. Reconnect the bus bar.
DO NOT run the generator with the bus bar disconnected.
The AVR sensing wires have now been checked. Continue with
Flashing the Generator.
Yes____
No____
Your reading
Continue
Remove the vent cover from the generator and
check the generator for damage.
Yes____
No____
Your reading
Continue
Remove the vent cover from the generator and
check the generator for damage.
Yes____
No____
Your reading
The sensing wires
are OK.
Remove the vent cover from the generator and
check the generator for damage.
ECM
Bus bar
L/W
wc_gr003694
VOLT
B
R
G
Y
L
5C
AMP
HZ STAB
5B 7 5A 6 5 4A 4 3A 3 2 1
n/a
n/a
AVR
Green (G)
Black (B)
1000
200
20
2
200m
F
V
A
V-
COM
Содержание G 85
Страница 1: ...Repair Manual Mobile Generator G 85 0171726en 004 0809 0 1 7 1 7 2 6 E N ...
Страница 8: ...Table of Contents MG Repair wc_br0171726en_004TOC fm 8 ...
Страница 17: ...Mobile Generator Theory of Operation wc_tx001077gb fm 17 wc_gr003303 c a a d e f b c b d e ...
Страница 58: ...ECM Sensor Troubleshooting Mobile Generator wc_tx000723gb fm 58 Notes ...
Страница 85: ...Mobile Generator Disassembly Assembly wc_tx000575gb fm 85 c h b d d e f g a wc_gr003320 a ...
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Страница 95: ...Mobile Generator Disassembly Assembly wc_tx000575gb fm 95 Notes ...
Страница 97: ...Mobile Generator Disassembly Assembly wc_tx000575gb fm 97 wc_gr003351 a c c e g b d f ...
Страница 99: ...Mobile Generator Disassembly Assembly wc_tx000575gb fm 99 wc_gr003352 a c c e g b d f ...
Страница 101: ...Mobile Generator Disassembly Assembly wc_tx000575gb fm 101 a c b b wc_gr003350 ...
Страница 103: ...Mobile Generator Disassembly Assembly wc_tx000575gb fm 103 wc_gr003286 a b c ...
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Страница 111: ...Mobile Generator Disassembly Assembly wc_tx000575gb fm 111 Notes ...
Страница 122: ...Technical Data G 85 wc_td000214gb fm 122 10 8 Generator Wiring Diagram BOM REV 0009369 124 0009459 133 0620003 129 ...