Johnson Controls PENN VFD68 User manual

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VFD68 Variable Frequency Drive (575 VAC) Installation Instructions
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
North American Emissions Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Agency Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Checking the Rating Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Selecting a Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Selecting a VFD68 Drive for Controlling Multiple Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Terminal Screw Torque Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Branch Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Short Circuit Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
High-Voltage Wire Size and Maximum Wire Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Selecting the Correct VFD68 Drive for a Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Calculating the Maximum Wire Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Making High-Voltage Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Making Low-Voltage Wiring Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Input Wiring Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Setup and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Correspondences Between Digital and Actual Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
VFD68 Variable Frequency Drive (575 VAC)
Installation Instructions
VFD68Dxx Part No. 24-7664-3116, Rev. D
Issued October 2017

VFD68 Variable Frequency Drive (575 VAC) Installation Instructions
2
Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Mode of Operation Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Display Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
VFD68Dxx Drive Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Frequency and Motor Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Parameter Settings Calculations for Motor Speed vs. Pressure . . . . . . . . . . . . . . . . . . . . . . 25
PWM Frequency, Audible Motor Noise, and EMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Adjusting the Default Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Enter the Parameter Adjustment Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Select and Change Most Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Select and Change P.90x Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Exit the Parameter Adjustment Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Manual Motor Speed Control in PU Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
EXT Mode Using Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Resetting the VFD68 Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reset Option 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reset Option 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Manually Stopping the Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Restarting the Motor After It Has Stopped . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
VFD68Dxx Variable Frequency Drive (575 VAC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

VFD68 Variable Frequency Drives (575 VAC)
3
VFD68 Variable Frequency Drives (575 VAC)
Introduction
The VFD68 Variable Frequency Drives are designed to provide three-phase motor speed control in a variety of
HVACR applications. The VFD68 Drives are factory-configured for condenser fan speed control on HVACR
condensing units. You can quickly and easily reconfigure the VFD68 Drives to control variable speed pumps in
cooling and heating applications, or to drive variable speed supply fans in VAV applications.
This document provides information for VFD68Dxx (575 VAC) Drive models only. For information pertaining to
VFD68Bxx (230 VAC) and VFD68Cxx (460 VAC) Drive models, refer to the VFD68 Variable Frequency Drive
(230 or 460 VAC) Installation Instructions (Part No. 24-7664-3108).
Note: The VFD68 Drive cannot drive motors in conveyor systems or robotic applications.
Note: Do not attempt to install, operate, maintain, or inspect the VFD68 Drive until you have read through
this document carefully and can use the equipment correctly. Do not use this product until you fully
understand the equipment, safety information, and instructions.
To view the VFD68 Variable Frequency Drive Technical Bulletin (Part No. 24-7664-3051), which covers
230 VAC, 460 VAC, and 575 VAC models, visit the following web address:
http://cgproducts.johnsoncontrols.com/MET_PDF/2476643051.pdf
North American Emissions Compliance
United States
Canada
IMPORTANT: Use this VFD68 Variable Frequency Drive only as an operating control. Where failure or
malfunction of the VFD68 Drive could lead to personal injury or property damage to the controlled equipment
or other property, additional precautions must be designed into the control system. Incorporate and maintain
other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect
against failure or malfunction of the VFD68 Drive.
IMPORTANT: Utiliser ce VFD68 Variable Frequency Drive uniquement en tant que dispositif de
régulation. Lorsqu'une défaillance ou un dysfonctionnement du VFD68 Drive risque de provoquer des
blessures ou d'endommager l'équipement contrôlé ou un autre équipement, la conception du système de
contrôle doit intégrer des dispositifs de protection supplémentaires. Veiller dans ce cas à intégrer de façon
permanente d'autres dispositifs, tels que des systèmes de supervision ou d'alarme, ou des dispositifs de
sécurité ou de limitation, ayant une fonction d'avertissement ou de protection en cas de défaillance ou de
dysfonctionnement du VFD68 Drive.
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when this equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in
a residential area may cause harmful interference, in which case users will be required to correct the
interference at their own expense.
This Class (A) digital apparatus meets all the requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte toutes les exigences du Règlement sur le matériel
brouilleur du Canada.

VFD68 Variable Frequency Drives (575 VAC)
4
Agency Standards Compliance
• North America: cULus Listed; UL 508C, USA File: NMMS.E244421; Canada File: NMMS7.E244421
Installation
Checking the Rating Plate
Before you install the VFD, check the rating plate on the side to verify that the voltage, kW (horsepower), and
output current ratings are correct for your application. See Figure 1, Table 1, and Selecting the Correct VFD68
Drive for a Fan Motor on page 13.
For example, a VFD68DGM would be rated for 575 VAC and 2 horsepower.
Table 1: VFD68Dxx Drive Model Information
Voltage kW (Horsepower) Dimensions, H x W x D, mm (in.)
D575 VAC, 50/60 Hz
F0.75 (1)
G1.5 (2)
H2.2 (3)
J3.7 (5)
K5.5 (7-1/2)
L7.5 (10)
M150 x 140 x 136 (5-15/16 x 5-1/2 x 5-5/16)
N150 x 220 x 148 (5-15/16 x 8-11/16 x 5-13/16)
IMPORTANT: Frequently starting and stopping the VFD shortens the lifespan of the VFD68
Drive. In applications where the drive starts or stops frequently, select a VFD that has an output
current rating that is 1.5 to 2 times greater than the FLAcurrent rating of the three-phase motor.
Figure 1: Rating Plate
Rating plate
VFD model
Input rating
Output rating
Serial number
DATE:XXXX-XX
Production year and month
Johnson Controls
VFD68
-2C
Voltage
Kilowatts
(Horsepower)
Dimensions
H x W x D
FIG:VFD68_rtng_plt
SERIAL :
OUTPUT : XXXX
INPUT : XXXX
MODEL

VFD68 Variable Frequency Drives (575 VAC)
5
Selecting a Motor
Motors used with the VFD68Dxx Drive must:
• be AC induction three-phase motors that are UL Recognized and CSA Certified, or equivalent
• be rated for 575 VAC at 60 Hz
• have an Inverter Rating
• have Insulation Class F or better
The VFD68 Drive is intended for use with variable speed motors that are rated for 40:1 operation.
Note: If three-phase power is not available as supply power for the VFD68 Drive, refer to the VFD68 Variable
Frequency Drive Technical Bulletin (Part No. 24-7664-3051).
Selecting a VFD68 Drive for Controlling Multiple Motors
AVFD68 Drive can control multiple motors wired in parallel; however, the sum of the Full LoadAmperes (FLA)
ratings for the motors must not exceed the maximum output current rating of the VFD68 Drive, including any
de-rating due to altitude. See Table 2 on page 6 for derating information.
Location Considerations
Observe the following location guidelines:
• Ensure that the mounting surface can support the drive, mounting hardware, and any (user-supplied) panel
or enclosure.
• Mount drives on flat, even surfaces.
• Allow sufficient space for wires and connections.
• Do not mount the modules on surfaces that are prone to vibration or in locations where radio frequency or
electromagnetic emissions may cause interference.
IMPORTANT: When selecting the motor, do not exceed the maximum output current rating of the
VFD68 Drive.
IMPORTANT: Do not control both single-phase and three-phase motors with the same VFD68 Drive.
!
WARNING: Risk of Fire or Electric Shock.
Install the device in an environment relatively free of contaminants such as dust, condensation, or
chemical agents. A dirty or damp environment may cause an electric arc across contaminated
terminals.
AVERTISSEMENT: Risque de décharge électrique ou incendie.
Installer l'appareil dans un environnement présentant une quantité réduite de contaminants tels que
de la poussière, de la condensation ou des agents chimiques. Un environnement pollué ou humide
risque d'entraîner la formation d'un arc électrique entre des bornes contaminées.
!
CAUTION: Risk of Property Damage.
The VFD68 Drive can generate and dissipate significant heat. Mount the VFD68 Drive on a metal,
concrete, or cinder block mounting surface. Mounting the VFD68 Drive on surfaces made of wood
or other heat-sensitive material may result in damage to the mounting surface.
MISE EN GARDE: Risque de dégâts matériels.
Le VFD68 Drive peut générer et émettre une chaleur importante. Installer le VFD68 Drive sur une
surface de montage en métal, en béton ou en parpaings. L'installation du VFD68 Drive sur une
surface en bois ou composée de matériaux sensibles à la chaleur risque d'endommager la surface
de montage.

VFD68 Variable Frequency Drives (575 VAC)
6
• Do not install the modules in airtight enclosures.
• Do not install heat-generating devices that may cause the temperature to exceed the ambient operating
limit in the same enclosure as the modules.
The VFD68 Drive has been approved for use in an enclosure. Approval tests were conducted under the
conditions in Table 2.
When mounting the VFD68 Drive in an enclosure, ensure that the specified space around the drive is
maintained, and that the ambient conditions are within the specified limits.
IMPORTANT: The drive is intended to be mounted in an enclosure that only allows access by trained
and authorized personnel, and that prevents the ingress of contamination. It is designed for use in an
environment classified as pollution degree 2 in accordance with IEC 60664-1. This means that only dry,
non-conducting contamination is acceptable.
Table 2: Environmental Considerations
Surrounding Air
Temperature1
1. Surrounding air temperature is a temperature measured at a measurement position in an enclosure. Ambient air
temperature is a temperature outside an enclosure. The VFD68 is designed to operate above 50°C by following the
maximum output current derating limits show in Table 3 and Figure 2.
-40 to 50°C (-40 to 122°F)
as measured 5 cm from the VFD
Ambient Humidity 90% RH or less (Non-condensing)
Storage Temperature -40 to 65°C (-40 to 149°F)
Atmosphere Indoors (no corrosive and flammable gases, oil mist, dust and dirt.)
Altitude Limit2: Below 1,000 m (3,280 ft) above sea level
2. Altitude limit given is for standard operation of the VFD. For operation at higher altitudes, derate by 3% for each 500 m
(1,640.4 ft), up to a maximum of 2,500 m (8,202 ft) (91% derating).
Vibration Limit: 5.9 m/s2(19.4 ft/s2)or less at 10 to 55 Hz (directions of x, y, and z axes)
Table 3: Maximum Current Output Derating above 50°C by VFD68Dxx Drive Model
VFD68Dxx Models Rated Capacity
kW (HP) Maximum Output Current at 50°C
(Amperes)
Maximum Output
Current at 60°C
(Amperes)
Maximum Output
Current at 70°C
(Amperes)
VFD68DFM 0.75 (1) 1.7 1.4 1.1
VFD68DGM 1.5 (2) 2.7 2.3 1.8
VFD68DHM 2.2 (3) 4.0 3.4 2.8
VFD68DJN 3.7 (5) 6.1 5.1 4.2
VFD68DKN 5.5 (7.5) 9.0 7.6 6.3
VFD68DLN 7.5 (10) 12.0 10.2 8.4
VFD68
x = Measurement Position
5 cm
(
2 in.)
5 cm
(2 in.)
5 cm
(2 in.)
x
x
x
FIG:temp_loc_diag

VFD68 Variable Frequency Drives (575 VAC)
7
.
Dimensions
Table 4: Dimensions for VFD68Dxx Drives, mm (in.)
VFD Model H H1 W W1 D
VFD68DFM 150 (5-15/16) 138 (5-7/16) 140 (5-1/2) 128 (5-1/16) 136 (5-3/8)
VFD68DGM
VFD68DHM
VFD68DJN 220 (8-11/16) 208 (8-3/16) 148 (5-13/16)
VFD68DKN
VFD68DLN
Figure 2: VFD68Dxx Maximum Current Output Derating above 50°C

Figure 3: Dimensions for VFD68Dxx Drives, mm (in.)

VFD68 Variable Frequency Drives (575 VAC)
8
Mounting
1. To remove the front cover, push down on the hooks at Position A and Position B and pull the front cover
away from the VFD68 Drive, using the hooks at Position C as supporting points (Figure 4).
2. Remove the high-voltage wiring cover at the bottom of the VFD68 Drive by pulling in the direction of
Arrow A (Figure 5).
Mount the VFD vertically in an acceptable NEMA-rated enclosure on a non-flammable surface. When you drill
the mounting holes and mount the VFD, ensure you do not allow metal chips or other material to enter the
VFD housing.
Figure 4: Release the Hooks and Remove the Front Cover.
Figure 5: Remove the High-Voltage Wiring Cover
Wiring Hole

VFD68 Variable Frequency Drives (575 VAC)
9
See Figure 6 and Table 5 for mounting space requirements.
Table 5: Required Clearance
Dimension 3.7 kW (5 HP) or Less 5.5 to 7.5 kW (7-1/2 to 10 HP)
A100 mm (4 in.) or more 100 mm (4 in.) or more
B10 mm (7/16 in.) or more 50 mm (2 in.) or more
C
Figure 6: Required Clearance for Mounting Inside an Enclosure
5.5 to 7.5 kW (7-1/2 to 10 HP)
FIG:clrnc_rqrd
Side
VFD
3.7 kW (5 HP) or Less
C
A
A
Front
VFD VFD
BB B
AA
AA
Side
Front
VFD VFD VFD
AAA
AAA
BBBC

VFD68 Variable Frequency Drives (575 VAC)
10
Wiring
!
WARNING: Risk of Electric Shock.
Disconnect the power supply before making electrical connections. Contact with components
carrying hazardous voltage can cause electric shock and may result in severe personal injury or
death.
AVERTISSEMENT: Risque de décharge électrique.
Débrancher l'alimentation avant de réaliser tout branchement électrique. Tout contact avec des
composants porteurs de tensions dangereuses risque d'entraîner une décharge électrique et de
provoquer des blessures graves, voire mortelles.
!
WARNING: Risk of Electric Shock.
Do not touch any exposed metal parts with anything other than properly insulated tools or insulated
probes of the digital voltage meter. Failure to use properly insulated tools and probes may result in
severe personal injury or death.
AVERTISSEMENT: Risque de décharge électrique.
Ne jamais toucher une partie métallique exposée avec tout élément autre que des outils
correctement isolés ou les sondes isolées du voltmètre numérique. L'utilisation d'outils et de sondes
incorrectement isolés risque de provoquer des blessures graves, voire mortelles.
!
WARNING: Risk of Electric Shock.
To avoid possible electric shock, wait at least 10 minutes after theAC supply power has been
disconnected from the VFD68 Drive before servicing the device. The VFD68 Drive remains
electrically charged for a period of time after power is removed. Failure to wait until the VFD68 Drive
fully discharges could cause electric shock, personal injury, or death.
AVERTISSEMENT: Risque de décharge électrique.
Afin d'éviter tout risque de décharge électrique, attendre au moins 10 minutes après la déconnexion
de l'alimentation CA du VFD68 Drive pour intervenir sur l'appareil. Le VFD68 Drive reste chargé
électriquement pendant un certain temps après la coupure de son alimentation. Le non-respect du
délai de décharge électrique complète du VFD68 Drive peut entraîner une décharge électrique
provoquant des blessures graves, voire mortelles.
!
CAUTION: Risk of Property Damage.
Do not apply power to the system before checking all wiring connections. Short circuited or
improperly connected wires may result in permanent damage to the equipment.
MISE EN GARDE: Risque de dégâts matériels.
Ne pas mettre le système sous tension avant d'avoir vérifié tous les raccords de câblage. Des fils
formant un court-circuit ou connectés de façon incorrecte risquent d'endommager irrémédiablement
l'équipement.
!
CAUTION: Risk of Property Damage.
Do not run low-voltage cable in the same conduit or wiring troughs with high-voltage wires. Running
low- and high-voltage wires in the same conduit or wiring troughs may damage the equipment or
cause system malfunction.
MISE EN GARDE: Risque de dégâts matériels.
Ne pas faire courir un câble basse tension dans les mêmes gaines ou goulottes électriques que des
câbles haute tension. L'installation de fils basse tension et haute tension dans les mêmes gaines ou
goulottes électriques risque d'endommager l'équipement ou de provoquer des dysfonctionnements
du système.
IMPORTANT: Use copper conductors only. Make all wiring in accordance with local, national, and
regional regulations.

VFD68 Variable Frequency Drives (575 VAC)
11
Precautions
Before you apply power to the VFD68 Drive and controlled motor, always recheck the following items:
• Connect the VFD68 Drive only to three-phase induction motors. Connecting the VFD68 Drive to other
electrical equipment may cause damage.
• Applying power to the output terminals (U, V, W) of the VFD damages the VFD. Never connect supply
power to the drive output terminals.
• If you wire multiple motors to the VFD68 output, run separate wires to each motor. Do not use daisy-chain
wiring.
• Do not install a power factor correction capacitor, surge suppressor, or capacitor type filter on the VFD
output side. These devices can cause the VFD to trip, or they can damage the capacitor and surge
suppressor.
• A high-voltage charge remains in the VFD electronic components for a short time after the power is
switched off.
Wait at least 10 minutes after the power supply has been switched off to allow the electric charge and heat
to dissipate. Using a voltmeter, make sure that the voltage across the main circuit terminals P/+ and N/- of
the VFD is no more than 30 VDC.
• A short circuit or earth (ground) fault on the VFD output side can damage the VFD.
- Check the insulation resistance of the circuit before you operate the VFD; repeated short circuits may
damage the VFD. These short circuits may be caused by peripheral circuit inadequacy, an earth
(ground) fault due to wiring inadequacy, or reduced motor insulation resistance.
- Check the ground (to-earth) insulation and phase-to-phase insulation of the VFD output side before
applying power.
Carefully check the motor insulation resistance, especially when the VFD is used with an old motor or
a motor located in unfavorable conditions.
• Do not exceed the permissible voltage to the VFD I/O signal circuits.
Applying a voltage higher than the permissible voltage to the VFD I/O signal circuits, or applying voltage of
opposite polarity, may damage the I/O devices.
• Do not short circuit the +VDC excitation voltage outputs (terminals 10 and PC) to common (terminals: 5
and SD). Shorting the excitation voltage outputs to common may damage the VFD68.
IMPORTANT: Do not exceed the VFD68 Drive's electrical ratings. Exceeding the drive electrical ratings
can result in permanent damage to the drive and void any warranty.
IMPORTANT: Run all low-voltage wiring and cables separate from all high-voltage wiring. Shielded
cable is strongly recommended for input (sensor) and analog output cables that are exposed to high
electromagnetic or radio frequency noise.
IMPORTANT: Electrostatic discharge can damage VFD68 Drives. Use proper electrostatic discharge
(ESD) precautions during installation and servicing to avoid damaging VFD68 Drives.
IMPORTANT: Do not connect supply power to the VFD68 Drive before finishing wiring and checking all
wiring connections. Short circuits or improperly connected wires can result in damage to the drive and void
any warranty.

VFD68 Variable Frequency Drives (575 VAC)
12
• Prevent VFD-generated EMI from causing functional problems.
- Do not run the low-voltage signal cables and the high-voltage power cables in parallel with each other,
and do not bundle them together.
- Run low-voltage signal cables as far away as possible from high-voltage power cables.
- Use shielded cables for the low-voltage signal cables. Connect the sensor cable shield at only one
point and that one point is the same terminal as the sensor's common wire.
- Install a ferrite core on the signal cable (for example, ZCAT3035-1330 TDK).
Terminal Screw Torque Specifications
Tighten the terminal screw to the specified torque. Over-tightening the terminal screws may damage the
terminal blocks and screw threads. Loose terminal screw connections can result in a short circuit or
malfunction.
Branch Circuit Protection
Integral solid-state short circuit protection does not provide branch circuit protection. The installer must provide
branch circuit protection in accordance with the National Electrical Code for the U.S. or the Canadian Electrical
Code for Canada and any additional codes.
As specified, UL Class T fuses or any faster acting fuse with the appropriate rating or Listed UL 489 Molded
Case Circuit Breaker (MCCB) must be employed in accordance with Table 7.
Short Circuit Ratings
The VFD68 Drives meet the requirements for their respective rating categories (Table 8).
Table 6: Torque Specifications for VFD68Dxx Drives
Rated Capacity, kW (HP) Terminal Screw Size1
1. The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, PR, P/+, N/-, P1 and a screw for
earthing (grounding).
Tightening Torque, N•m (lb•in.)
0.75–7.5 (1–10) M4 1 (8.85)
Table 7: VFD68Dxx Drives Electrical Ratings
VFD68 575 VAC kW (HP)
0.75 (1) 1.5 (2) 2.2 (3) 3.7 (5) 5.5 (7.5) 7.5 (10)
Rated fuse voltage (V) 575 V or more
Fuse Maximum allowable rating (A)
(without power factor improving reactor)1
1. Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.
6 A 10 A 15 A 20 A 30 A 40 A
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)15 A 10 A 15 A 20 A 30 A 30 A
Table 8: VFD68 Drives Short Circuit Ratings
Rating Category Suitable for use in a circuit capable of delivering not more than
VFD68Dxx Drives (575 VAC Class) 100 kA rms symmetrical amperes, 600 V maximum

VFD68 Variable Frequency Drives (575 VAC)
13
High-Voltage Wire Size and Maximum Wire Length
Use UL Listed copper, stranded wire with insulation rated at 75°C (167°F) for wiring the high-voltage supply to
the drive (R/L1, S/L2, T/L3) and wiring the high-voltage drive output (U, V, W) to the motor.
Selecting the Correct VFD68 Drive for a Fan Motor
1. Determine the maximum current consumption from the motor ratings label.
2. Use Table 9 to find the maximum output current that just exceeds the motor’s maximum current
consumption and use the VFD68 part number associated with this maximum output current as the
recommended drive for the motor.
3. Use the same table to determine the recommended cable wiring size for the output current rating.
IMPORTANT: Use copper conductors only. Make all wiring in accordance with local, national, and
regional regulations.
Table 9: Maximum Output Amperes and Wiring Sizes for VFD68Dxx Drives
Part Number Rated
Capacity,
kW (HP)
Maximum
Output
Current
(Amperes)
Cable Wire Size
AWG1
1. The recommended cable wire size is that of the cable (THHW cable) with a continuous maximum permissible
temperature of 75°C (167°F). Assumes that the surrounding air temperature is 40°C (104°F) or less. (Selection
example for use mainly in the United States.)
PVC wire cables, (mm2)2
2. The recommended cable wire size is that of the cable (PVC cable) with a continuous maximum permissible
temperature of 70°C (158°F). Assumes that the surrounding air temperature is 40°C (104°F) or less. (Selection
example for use mainly in Europe.)
R/L1,S/L2,
T/L3 U, V, W R/L1, S/ L2, T/L3 U, V, W Earthing (Ground) Cable
VFD68DFM 0.75 (1) 1.7 14 14 2 2 3.5
VFD68DGM 1.5 (2) 2.7 14 14 2 2 3.5
VFD68DHM 2.2 (3) 4.0 14 14 2 2 3.5
VFD68DJN 3.7 (5) 6.1 14 14 2 2 3.5
VFD68DKN 5.5 (7-1/2) 9.0 14 14 2 2 5.5
VFD68DLN 7.5 (10) 12.0 12 14 3.5 2 5.5

VFD68 Variable Frequency Drives (575 VAC)
14
Calculating the Maximum Wire Length
1. Use the recommended wire size in accordance with local, national, and regional regulations to determine
the electrical resistance of the wire (R) according to Table 10.
2. Find the rated voltage (V) and maximum output current (I) from the rating plate on the selected VFD68
Drive.
3. Use Figure 7 to determine the maximum recommended wiring length for the VFD68 Drive.
Note: If the maximum wire length needs to be extended, select a larger wire size and recalculate the
maximum wire length. Do not exceed 100 m.
Note: Maximum wiring length is also affected by the setting of P. 72. See PWM Frequency, Audible Motor
Noise, and EMI on page 25.
Example:
Given a VFD68DGM-2C model, what is the maximum wiring length?
a. Table 1 on page 4 indicates that a VFD68DGM-2C model is a 575 VAC Drive, rated for 1.49 kW (2
HP).
b. The rating information plate (Figure 1 on page 4) for that model indicates that the VFD68DGM Drive
has a voltage rating of 575 VAC and a maximum output rating of 7 amperes.
c. Table 9 on page 13 gives the recommended wire size as 14 AWG.
d. Table 10 on page 14 shows 14 AWG size wire as having an electrical resistance of 8.28 milliohms/
meter.
e. Using the equation in Figure 7 on page 14 and using the values we found in the steps above:
(11.5 * 230) / (7 * 8.28) = 2656.6 / 57.96 = 45.8
The maximum wire length is 45.8 meters.
Table 10: Electrical Resistance by Wire Size
Recommended
Wire Size1
1. The mm wire sizes that are given as equivalences to the AWG wire sizes are not commercially available.
Electrical Resistance of
Wire (milliohms/meter) Recommended
Wire Size1Electrical Resistance of
Wire (milliohms/meter)
25 mm20.727 5.3 mm2 (10 AWG) 3.28
21.2 mm2 (4 AWG) 0.815 4 mm24.61
16 mm 1.15 3.3 mm2 (12 AWG) 5.21
13.3 mm2 (6 AWG) 1.30 2.5 mm27.41
10 mm21.83 2 mm2(14 AWG) 8.28
8.3 mm2 (8 AWG) 2.06 1.5 mm212.1
6 mm23.08
Figure 7: Maximum Wire Length Calculation
Maximum Wire Length =
(11.55 *V
)
(I*R)
V = Voltage rating (575 VAC)
I = Maximum output current (amperes)
R = Electrical resistance of the wire (milliohms/meter)
FIG:mxwrlngth_575

VFD68 Variable Frequency Drives (575 VAC)
15
Making High-Voltage Wiring Connections
1. Push down on the hooks at Position A and Position B and pull it away from the VFD68 Drive, using the
hooks at Position C as supporting points (Figure 8).
2. Remove the high-voltage wiring cover at the bottom of the VFD68 Drive by pulling in the direction ofArrow
A (Figure 9).
3. Connect a 575 VAC three-phase power supply to high-voltage terminals R/L1, S/L2, and T/L3 (Figure 10).
4. Connect the high-voltage power supply to terminals R/L1, S/L2, and T/L3 on the drive (Figure 10).
Figure 8: Release the Hooks and Remove the Front Cover
Figure 9: Remove the High-Voltage Wiring Cover
Wiring Hole

VFD68 Variable Frequency Drives (575 VAC)
16
Note: Use UL-Listed, copper stranded wire with insulation rated at 75°C (167°F) for wiring the high-voltage
supply to the drive (R/L1, S/L2, T/L3) and wiring the high-voltage drive output (U, V, W) to the motor.
5. Connect earth ground wiring to the earth ground terminals on the VFD68 Drive and on the motor.
6. Replace the high-voltage wiring cover.
Note: When replacing the high-voltage cover, carefully space and position the leads through the vents or
wire slots.
Figure 10: High-Voltage Terminal Block Wiring
Jumper
IM
N/- P/+
R/L1 S/L2
W

VFD68 Variable Frequency Drives (575 VAC)
17
Making Low-Voltage Wiring Connections
Low-voltage wiring terminals are located underneath the front cover. After you finish making the low-voltage
wiring connections, replace the front cover. .
Table 11: VFD68Dxx Drives Low-Voltage Connection Information for the Primary Board (Part 1 of 2)
Terminal
Label1Signal Type Description
RH Contact Input Run High Speed
RM Contact Input Run Medium Speed
RL Contact Input Run Low Speed
MRS Contact Input Current Input Selection - Connect terminal MRS to terminal SD to enable the
4–20 mA input, Analog Input 2 (AI2).
RES Contact Input Reset - Turn on the RES signal (100 ms or longer) to turn off the VFD output and
reset the thermal relay and regenerative brake circuits
SD Common Common for contact inputs (using Sink logic - default setting) and 24 VDC supply
AM Analog Output 0–10 VDC analog output corresponding to output frequency
PC +24V +24 VDC Supply
SE Open Collector
Common Common for RUN terminal
RUN Open Collector
Transistor Output VFD Running - Switched low (transistor conducts) when the VFD output frequency is higher than the start frequency (the motor is running). Switched high (transistor is
off) when the motor is off.
FU Open Collector
Transistor Output Frequency detection output - switched low (transistor conducts) when VFD output frequency has reached or exceeded the detection frequency. Switched high
(transistor is off) when VFD output frequency is below detection frequency.
ARelay Output (N.O.) During normal operation, relay contacts A and C are connected. (maximum alarm
load: 230 VAC, 0.3 A or 30 VDC, 0.3 A).
Figure 11: VFD68Dxx Drives Connection Information

VFD68 Variable Frequency Drives (575 VAC)
18
BRelay Output (N.C.) During normal operation, relay contacts B and C are connected (maximum alarm
load: 230 VAC, 0.3 A or 30 VDC, 0.3 A).
CRelay Output (C) Relay output common
10 +5 V +5 VDC Supply for P499R Transducers (15 mA maximum)
2Analog Input Analog Input 1 (AI1) accepts 0–5 V or 0–10 V DC analog input signals
5Analog Common Common for analog inputs
4Analog Input Analog Input 2 (AI2) accepts 4–20 mA analog input signals
SD Common Common for contact inputs (when using Sink logic - default setting).
STF Contact Input Forward rotation. Must connect STF to SD terminal (common) using the
factory-supplied jumper to allow the VFD to rotate in a forward direction.
STR Contact Input Reverse rotation (not used)
SD Common Common for contact inputs (when using Sink logic - default setting).
1. Gray cells indicate a terminal that is typically not used in condenser fan speed control applications.
Table 12: VFD68Dxx Drives Low-Voltage Connection Information for the High Input Signal
Select Board
Terminal
Label Signal Type Description
5V +5V +5 VDC Supply for P499R Transducers (15 mA maximum)
IN1 Analog Input Analog Input 1 for 0.5 to 4.5 V Ratiometric High Signal Select
GND Analog Common Common for analog inputs
5V +5V +5 VDC Supply for P499R Transducers (15 mA maximum)
IN2 Analog Input Analog Input 2 for 0.5 to 4.5 V Ratiometric High Signal Select
GND Analog Common Common for analog inputs
Table 11: VFD68Dxx Drives Low-Voltage Connection Information for the Primary Board (Part 2 of 2)
Terminal
Label1Signal Type Description

VFD68 Variable Frequency Drives (575 VAC)
19
Input Wiring Connections
Wire the input device to the analog input terminals and make any necessary parameter adjustments. See
Setup and Adjustment on page 20 and Parameter Settings Calculations for Motor Speed vs. Pressure on page
25 for more information.
0.5–4.5 VDC Ratiometric P499 Transducer
The default parameter settings (Table 13) on the VFD68 Drive are configured to operate a condenser fan motor
on an R410 condensing unit, using a
P499RCP-107 or P499RAP-107 Ratiometric Transducer (Figure 12).
For high-pressure refrigerants other than R410a, you must calculate and change the P.90x parameters. For
medium and low pressure refrigerants, you must determine the proper P499R Transducer and then calculate
and change the P.90x parameters.
For more information, see Setup and Adjustment on page 20 and Parameter Settings Calculations for Motor
Speed vs. Pressure on page 25.
Note: To use a 0–10V or 4–20mA P499 Transducer, refer to the VFD68 Variable Frequency Drive Technical
Bulletin (Part No. 24-7664-3051).
Table 13: Settings for a 0.5–4.5 VDC Transducer
Setting 0–5 V
Analog Input Terminals IN1 and IN2
Figure 12: Wiring 0.5 to 4.5 VDC Ratiometric Input Signal Transducers

VFD68 Variable Frequency Drives (575 VAC)
20
Setup and Adjustment
Correspondences Between Digital and Actual Characters
The actual alphanumeric characters correspond to the following digital characters displayed on the operation
panel:
Operation Modes
Mode of Operation Icons
The VFD68 Drive mode of operation is indicated by the mode of operation icons (labeled PU and EXT) on the
drive’s operation panel (Figure 13).
PU Mode: The Parameter Units (PU) mode is manual control mode. In PU mode, the drive and motor are
completely controlled using the buttons and the setting dial on the drive user interface. No external analog
signals or network signals control the drive operation. The PU mode is typically used to set up, test, and
troubleshoot the drive and motor operation using controlled input signal values.
EXT Mode: In the External (EXT) mode, the drive and motor respond to a signal or signals from one or two
(external) analog input signal devices such as pressure transducers or analog controllers. This is the typical
mode of operation for the drive when it controls a condenser fan or other three-phase HVACR motor
application.
PU/EXT Mode: In PU/EXT mode, the drive responds to the connected external signal devices and the drive
setup values can be edited. The PU/EXT mode is typically used to set up your drive for initial operation, or to
adjust setup parameters on an operating application.
MON Mode: Shows motor speed represented as frequency (Hz) or RPM.
Display Code
Parameter Setting Mode: When the display shows Pr.., the VFD68 Drive displays parameter codes and
parameter setting values.
Actual Digital
0
1
2
3
4
5
6
7
8
9
Actual Digital
A
B
C
E
F
G
H
I
J
L
D
Actual Digital
M
N
O
o
P
T
U
V
r
-
S