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.

60

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Carrier 48EK, 48EW, 48EY024-068, 48AW, 48AY020-060 Carrier Default Program Parameter Values, Parameter Group Default Value
Page 59 Page 61

48EJ, 48AJ, 48AK, 48EK, 48AY020-060 specifications

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