Graco 3A1705J important safety instructions A4CH, A4CM MCM Alarm, A4DA, A4DB, A4DH

					Troubleshooting
Error	Error	Type	Name	Cause	Solution
Code	Location
A4CH	Hose	ALARM	High Relay	Wiring problem.	Check wiring between
			Current Hose		HPTCM and contactor.
					Look for shorted wire
					between HPTCM and
					contactor terminals A1
					and A2.
				Shorted contactor.	Measure resistance
					between A1 and A2
					terminals. The resistance
					should be about 289Ω.
					If contactor is measuring
					less than 100Ω, then the
					contactor is shorted and
					should be replaced.
A4CM	MCM	ALARM	High MCM	MCM is drawing too	If problem continues
			Current	much current from the	replace MCM. See system
				system.	repair manual.
A4DA	Boost A	ALARM	High Heater	Short circuit in booster	Check wiring for touching
A4DB	Boost B		Current	heater wiring.	wires.
				Bad heater.	Measure resistance of
					heater(s), replace if
					needed. See system
					repair manual.
A4DH	Hose	ALARM	High Heater	Short circuit in hose	Check continuity of
			Current	wiring.	transformer windings,
					normal reading are about
					0.2Ω on both primary and
					secondary. If reading is
					0Ω replace transformer.
					Check for shorts between
					the primary winding and
					the support frame of the
					transformer.

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