Emerson E2 operation manual Number of Fans field?, Trip

SYMPTOM	POSSIBLE PROBLEM	SOLUTION
Problems with Condenser	Condenser will not operate.	Verify that E2 is programmed
		with proper number of fans.
		1. Highlight the General tab (C1)
		in the Condenser Setup screen.
		2. Is the correct number of fans
		in the Number of Fans field?
	Incorrect board and point set-	Confirm proper board and point
	tings.	settings:
		Go to the Inputs tab (C3) in the
		Condenser Setup screen to check
		PRES CRTL IN and DISCH
		TRIP IN.
	Fail-Safe wiring on 8RO is	Verify proper fail-safe switch
	incorrect.	positions on the 8RO board. The
		fail-safe dip switches are labeled
		S2 on the 8RO and S3 on the
		8ROe and 8IO. Set the rocker
		UP (ON) to close the relay and
		turn the output ON during net-
		work failure. Set the switch
		DOWN (OFF) to open the relay
		and turn the output OFF during
		network failure.
	Condenser will not split.	Enable the condenser to split.
		Go to the General tab (C1) in the
		Condensers Setup screen and set
		the Split Enable field to Yes.
	Unsplit setpoint is set too low.	Unsplit setpoint value is com-
		pared with discharge pressure
		value instead of temperature.
		Enter the value in terms of dis-
		charge pressure.
		Go to the Setpoints tab (C2) in
		the Condensers Setup screen and
		check that the UNSPLIT STPT
		field value has been entered as a
		pressure value.
	Half of the fans are not running.	Check the split fan relay output:
		1. Go to the Other Outs tab (C7)
		in the Condensers Setup screen
		and check that SPLIT FAN has a
		board and point assignment.
		2. Verify Split is enabled: Go to
		General tab (C1) in the Condens-
		ers Setup screen and set the Split
		Enable field to Yes.
		3. Verify output is ON.

Appendix F: Troubleshooting • F-5