Voltmeter/Ammeter Help Displays - Miller Big Blue 700 Duo Pro DLX SF Owner's Manual

8-9. Voltmeter/Ammeter Help Displays

Use the Voltmeter/Ammeter help displays to diagnose and correct fault conditions.
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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 15 Weld output was temporarily reduced due to engine power limit exceeded. Help code clears after 5 seconds.
HL.P 20 Indicates a failure of meter display module PC2/PC22, or the wiring between PC2/PC22 and main control module PC1 (A
Side)/PC21 (B Side), or PC1/PC21. If this display is shown, have Factory Authorized Service Agent check PC1/PC21,
PC2/PC22, and the wiring between them.
HL.P 21 Thermistor TH1 in the IGBT module (each side) has failed. If this display is shown, have Factory Authorized Service Agent
check wiring between IGBT PM1.2 and PC1 and IGBT PM21, 22 and PC21.
HL.P 22 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 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/PC25, and main control module PC1/PC21.
HL.P 26 Indicates a fault when attempting to operate the unit in single operator mode (outputs internally paralleled). Help 26 indicates
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.
HL.P 96 Indicates a failure of communication to the WCC module inside the unit. If this appears on the display, check connections to
WCC module. If connections are secure, WCC module needs to be replaced; Contact Factory Authorized Service Agent.
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HL.P96 displays periodically (not continuously). The welding operation (without Smart Feeder) can continue.
Notes
OM-252624 Page 60
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Complete Parts List available at www.MillerWelds.com
HL.P 15
Display Example
Description