Carrier 48AK, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK Motor Standard Efficiency High Efficiency

Table 13 — Motor Electronic Thermal Protection (tHr) for Toshiba TOSVERT 130-E3 VFD

	MOTOR			STANDARD EFFICIENCY				HIGH EFFICIENCY
Hp		kW	IFM	230 V	380V	460V	575V	IFM	230V	460V
			Letter*	Setting	Setting	Setting	Setting	Letter*	Setting	Setting
5		3.73	A	66	100	72	89	L	72	72
7.5		5.60	B	100	100	80	76	M	100	80
10		7.46	C	96	94	97	91	N	96	100
15		11.19	D	78	94	100	100	P	78	100
20		14.92	E	87	94	100	95	Q	82	100
25		18.65	F	86	84	94	100	R	86	91
30		22.38	G	99	—	92	100	S	86	80
40		29.84	H	89	—	85	85	T	89	85

*IFM Letter refers to the 15th digit (Motor Option) of the unit model number

TOSHIBA TOSVERT VF-S9 VFD — The VFD must be powered up, however, since it is located near the indoor fan, operation of the fan is not desirable. To disable the fan and set the duct static pressure, perform the following procedure:

1.Open the Indoor Fan Circuit Breaker (IFCB). This will shut off power to the VFD.

2.Wait for the VFD display to go blank and the charge lamplight to go out. Remove the VFD cover without touching any interior components. It may take several minutes for the VFD to fully discharge.

A high voltage potential can exist with the indoor fan cir- cuit breaker open. The charge lamp LED, located on the upper left corner of the Toshiba TOSVERT VF-S9 VFD front cover, will indicate charged capacitors. DO NOT TOUCH internal high voltage parts if LED is lit.

3.Remove jumper between R and CC on the terminal block and replace the VFD cover. This will disable the running of the VFD. Refer to Fig. 58.

4.Close the IFCB and energize the Indoor Fan Contactor (IFC). The VFD is now powered but the fan will not operate.

5.On the front of the VFD is a keypad, which is used to change the VFD set point. At this point the drive should be disabled and the display read “OFF”. If the current output frequency is displayed then verify that the R and CC jumpers have been removed.

6.Press either the “DOWN ARROW” or “UP ARROW” key once, this will display the current frequency set point.

7.Press either the “DOWN ARROW” or “UP ARROW” key to change set point to the appropriate duct static set point desired. This number may be adjusted based on the

amount of static pressure (in. wg) required. Refer to the Table 8 to identify the VFD Set Point.

8.Press “ENT” 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 14 and 15.

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 II and P24. See Fig. 58.

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

12.Wait for the VFD display to go blank and the charge lamplight to go out. Remove the VFD cover without touching any interior components. It may take several minutes for the VFD to fully discharge.

13.Replace jumper across terminals R and CC.

14.Replace VFD cover.

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

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