Graco 3A1705J T4CA, T4CB, T4CH Hptcm, T4CM MCM Alarm, T4DA, T4DB, T4DE

					Troubleshooting
Error	Error	Type	Name	Cause	Solution
Code	Position
T4CA	Boost A	ALARM	(T4CA or T4CB)	Cooling fan not operating.	If fan is not working check
T4CB	Boost B		LPTCM Over		wiring between CB03 and
			Temperature		fan. If wiring is good, replace
T4CH	Hose		(T4CH) HPTCM		fan.
				Overheated module.	Turn controller off. Wait
			Over Temperature
					a few minutes. If the
					condition does not clear or
					regenerates consistently,
					replace module.
T4CM	MCM	ALARM	High MCM	High ambient	Ensure ambient temperature
			Temperature	temperature.	is below 120°F(48°C) before
					using the system.
				Overheated control	Stop the pumps. Wait
				module.	a few minutes. If the
					condition does not clear or
					regenerates consistently,
					replace MCM. See System
					Repair manual.
T4DA	Boost A	ALARM	High Chemical	Bad RTD or bad RTD	Swap A and B heater volex
T4DB	Boost B		Temperature	placement against heater	cables and RTD cables and
				rod.	see if issue follows. If so,
					replace RTD.
				Bad Low Power	Swap the A and B LPTCMs
				Temperature Control	and see if the issue follows
				Module.	the module. If so replace
					LPTCM. See system repair
					manual.
T4DE	Heat	ALARM	High Temperature	Broken Fan.	Check fan relay (K4) and
	Exchanger		Coolant Outlet		fuse (30 Amp ATO “F3”) on
					load center board. Replace
					if needed.
				Plugged radiator.	Replace if needed.
				High ambient	Ensure ambient temperature
				temperature.	is below 120°F(48°C) before
					using the system.

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