Carrier 48EK, 48EW, 48EY024-068, 48AW, 48AY020-060, 48AK Replace jumper across terminals ST and CC

8.Press “READ/WRITE” key, to enter the new value. The desired set point value will alternately flash to indicate that the new value has been stored.

IMPORTANT: The Carrier factory default values for the VFD may be different than the default values of the manu- facturer. Refer to the Carrier literature when checking default values. The following default values have been changed from the manufacturer settings to closely match the VFD operation with a Carrier VAV unit. Refer to Tables 12 and 13.

9.Fire-speed override mode is available by contact closure between terminals S1 and CC.

10.If the VFD is to be controlled by an external control sys- tem, other than the factory-supplied duct static pressure transducer, follow these steps:

a.Install a jumper between S2 and CC. This jumper will disable the PID (Proportional Integral Deriva- tive) control loop in the VFD. The VFD is set to

follow an external speed reference signal from the control system.

b.Connect the field-supplied speed reference (4-20 mA) signal across terminals IV and P24.

11.Once all the changes have been made, open the IFCB.

12.Wait for the VFD display to go blank and remove VFD cover without touching any interior components. Make sure that the charge indicator lamp is out. If still lit, wait until lamp goes completely out. This may take several minutes.

13.Replace jumper across terminals ST and CC.

14.Replace VFD cover.

15.Close the IFCB. The VFD is now powered and the fan will operate.

Table 12 — Carrier Default Program Parameter Values

PARAMETER GROUP	PARAMETER	DEFAULT VALUE
	ACC1	60.0 Sec
	DEC1	60.0 Sec
	UL	60.0 Hz
	LL	10.0 Hz*
	Luln	1
	P3	20%
SetP	F-P3	0.0 Hz
(Setup)	P4	100%
	F-P4	60 Hz
	tHr1	See Table 13
	StC1	0
	StL1	110%
	OLN	1
	tYP	5*
Gr.F	FH	60 Hz
(Fundamental)	Pt	2
	FbP1	1*
	Fbln	2
	GP	.30
	Gl	2 sec
Gr.Fb	GA	0
(Feedback)	GFS	80
	P1LL	10
	PuL	1
	PuUl	10
	PuLL	10
Gr.SF	Fsor	60 Hz
(Frequency Settings)
Gr.Pn	Fr	0*
(Panel Control)
	1t	1
	1t0	0
Gr.St	1t1	56
(Terminal Selection)	1t2	13
	1t3	3
	1t4	10
Gr.Pr	UuC	1*
	UuCt	2
(Protection)
	ArSt	3
Gr.Ut	Cnod	1*
	Fnod	2*
(Utility)
	bLPn	1*

*These settings differ from the Toshiba defaults and are required for Carrier applications.

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