Graco 3A1705J important safety instructions T2DA, T2DB, T2DH, T2DE, T3NM MCM Advisory, T4AE, T4BE

Troubleshooting
Error	Error	Type	Name	Cause	Solution
Code	Position
T2DA	Boost A	ALARM	Low Chemical	Flow is too high at current	Use a smaller mix chamber
T2DB	Boost B		Temperature	setpoint.	that is rated for the unit in
					use.
				Bad heater(s)	Confirm resistance of heater
					is 23–26.5 ohms. Replace if
					OL/open loop.
T2DH	Hose	ALARM	Low Chemical	Cold chemical in	Recirculate heated chemical
			Temperature	unheated portion of	back to drum in cold
				system passed hose FTS	conditions before startup.
				at startup.
T2DE	Heat	ADVISORY	Low Temperature	Radiator fan will not stop.	Replace fan relay. See
	Exchanger		Coolant Outlet		system repair manual.
				Engine thermostat is	Replace thermostat. See
				stuck open.	Perkins distributor to
					replace.
T3NM	MCM	ADVISORY	High Motor	Motor is operating	Run the system at a
			Temperature	outside of pressure	lower duty cycle or with a
				flow curve. The system	smaller mix chamber. See
				is running at a lower	Performance Charts, page
				setpoint to preserve	99.
				motor life.
T4AE	Heat	ALARM	High Chemical	Manual valve switch (MV)	Open cabinet cover and turn
T4BE	Exchanger		Temperature Hx A	on load center board is in	switch to the OFF position.
			(T4AE)	the ON position.
			High Chemical	A or B side control valve	Disconnect connector
				solenoid is stuck in the	from valve solenoid coil.
			Temperature Hx B
			(T4BE)	open position. Debris	If temperature does not
				in valve diaphragm	decrease, rebuild solenoid.
				or plunger preventing
				spring-loaded closed
				function.
				Short on load center	See Load Center
				board. If the blue and red	Diagnostics in the system
				LEDs are on while the	repair manual.
				heat is off, then the load
				center board is bad.
				(T4BE only) J6 connector	Reconnect J6 connector
				on load center “Heat	on load center in centered
				Valves” location is not	location.
				centered.
				A and B heat	See System Repair Manual
				exchanger RTD cables	for correct connection.
				cross-connected to
				splitter cable.

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