Graco 3A1705J T8DA, T8DB, T8DH, V1CM MCM Alarm, V1MH, V4CM MCM Alarm, V4MH, Wbnm MCM Alarm

					Troubleshooting
Error	Error	Type	Name	Cause	Solution
Code	Position
T8DA	Boost A	ALARM	Temperature Not	Bad heater rod (boost).	Measure resistance, 23 – 26
T8DB	Boost B		Rising		Ω, of heater rod, replace if
					reading open.
				Low chemical supply	Recirculate heated chemical
				temperature.	back to drum in cold
					conditions before spraying
					chemical below 32°F(0°C)
					at startup. Use Jog Mode for
					heat exchanger heating.
				Bad heated hose.	Measure hose resistance,
					replace if reading open.
T8DH	Hose	ALARM	Temperature Not	Started spraying before	Wait until operating
			Rising	engine and hose reached	temperatures have been
				operating temperature.	reached on engine and hose
					before spraying.
				Low chemical supply	Recirculate heated chemical
				temperature.	back to drum in cold
					conditions before spraying.
					Chemical below 32°F(0°C)
					at startup.
V1CM	MCM	ALARM	Bus Under	Tripped MCM circuit	Visually check circuit
			Voltage	breaker (CB02).	breaker for a tripped
					condition. If Diagnostic
					screen is enabled, MCM
					Bus 14 V indicates normal
					voltage and 1 V indicates
					failed MCM.
V1MH	Hose	ALARM	Low Line Voltage	Loose or bad connection.	Check wiring for loose wires.
				Low generator line	Measure voltage across
				voltage	main power switch (CT01).
					Voltage should measure
					between 190 and 264 VAC.
				High auxiliary inrush	Ensure compressor or
				current.	air dryer are setup to be
					continuous run and sized
					according to manual.
V4CM	MCM	ALARM	Bus Overvoltage	Incoming line voltage is	Measure voltage across
				too high.	main power switch (CT01).
V4MH	Hose	ALARM	High Line Voltage
					Voltage should measure
					between 190 and 264 VAC.
					If voltage is too high, see
					supplied alternator manual
					for generator specifications
					and repair.
WBNM	MCM	ALARM	Motor Sensor	Bad connection between	Check connection and
			Fault	MCM (Port 10) and brush	cables.
				wear/over temperature
				board.
				Bad brush wear/over	Replace Motor. See system
				temperature board.	repair manual.

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