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8-11. Voltmeter/Ammeter Help Displays
Use the Voltmeter/Ammeter help displays
to diagnose and correct fault conditions.
.
When a help code is displayed normal-
ly weld output has stopped but genera-
tor power output may be okay.
.
To reset help displays, stop unit and
then restart. See item 4 below to reset
Help 25 display.
1
Help 20 Display
Indicates a failure of meter display module
PC2/PC22, or
the
wiring
PC2/PC22 and main control module PC1
(A Side)/PC21 (B Side), or PC1/PC21. If
this display is shown, have Factory Autho-
rized Service Agent check PC1/PC21,
PC2/PC22, and the wiring between them.
2
Help 21 Display
Thermistor TH1 in the IGBT module (each
.
Complete Parts List available at www.MillerWelds.com
1
HL.P
2
HL.P
3
HL.P
4
HL.P
5
HL.P
side) on the heat sink has failed. If this dis-
play is shown, have Factory Authorized
Service Agent check TH1 (each side), and
the wiring between TH1 and PC1/PC21.
3
Help 22 Display
Indicates the IBGT module heat sink (each
side) has overheated. If this display is
shown, check generator cooling system
and/or reduce duty cycle. Keep engine ac-
cess door closed when running to maintain
proper cooling air flow past the heat sinks.
Allow unit to cool before restarting. If prob-
between
lem continues, have Factory Authorized
Service Agent check unit.
4
Help 25 Display
Indicates a remote device connected to
Remote Receptacle RC14 may be faulty.
Help 25 is also displayed whenever a re-
mote device has been connected to RC14
20
21
22
25
26
and then disconnected. Clear fault by stop-
ping and restarting the unit or by turning
Process/Contactor switch to another posi-
tion. If problem continues, have Factory
Authorized Service Agent check the re-
mote device, filter board PC5/PC25, and
main control module PC1/PC21.
5
Help 26 Display
Indicates a fault when attempting to oper-
ate the unit in single operator mode (out-
puts internally paralleled). Help 26 indic-
ates a failure of either side A or side B or
the communications between them which
prevents the unit from being operated in
the single operator mode. Return to dual
operator mode and check for output at both
sides. If output is normal, contact Factory
Authorized Service Agent to check internal
wiring and communications between
sides.
OM-267603 Page 57
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