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8-12. Voltmeter/Ammeter Help Displays
Use the Voltmeter/Ammeter help displays to diagnose and correct fault conditions.
.
When a help code is displayed normally weld output has stopped but generator power
output may be okay.
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To reset help displays, stop unit and then restart. See below to reset Help 25 display.
Display Code
HL.P 20
Indicates a failure of meter display module PC2, or the wiring between PC2 and main control module PC1, or PC1. If this display
is shown, have Factory Authorized Service Agent check PC1, PC2, and the wiring between them.
HL.P 21
Thermistor TH1 in the IGBT module on the heat sink has failed. If this display is shown, have Factory Authorized Service Agent
check TH1, and the wiring between TH1 and PC1.
HL.P 22
Indicates the IBGT module heat sink has overheated. If this display is shown, check generator cooling system and/or reduce
duty cycle. Keep engine access door closed when running to maintain proper cooling air flow past the heat sinks. Allow unit
to cool before restarting. If problem continues, have Factory Authorized Service Agent check unit.
HL.P 25
Indicates a remote device connected to Remote Receptacle RC14 may be faulty. Help 25 is also displayed whenever a remote
device has been connected to RC14 and then disconnected. Clear fault by stopping and restarting the unit or by turning Pro-
cess/Contactor switch to another position. If problem continues, have Factory Authorized Service Agent check the remote de-
vice, filter board PC5, and main control module PC1.
.
Complete Parts List available at www.MillerWelds.com
HL.P
Description
20
Display Example
OM-275624 Page 51
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