McQuay MPS 030 Installation Manual

Operation and Maintenance Manual OM 844-1

Group: Rooftop Systems

Part Number: OM 844

Date: January 2007

MD2 Variable Speed Drive Controllers

Packaged Rooftop Units RPS, RFS, RDT, RPE, and RDE

Rooftop Air Handler Units RDS and RAH

Vertical Self-Contained Units SWP and SWT

Commercial Packaged Rooftop Units MPS 030 to 050 Tons

Introduction.................................................................... 3

Applications With MicroTech II Control (A1a, A2, B1a,

B2, C, and D)............................................................ 4

Applications Without MicroTech II Controls (A1b and

B1b).......................................................................... 4

Replacement VFD .................................................... 4

Hazard Categories and Special Symbols ...................... 5

Before You Begin .......................................................... 6

Bus Voltage Measurement Procedure ..................... 7

Initial Start-Up........................................................... 8

Control Terminals .......................................................... 9

Switch Settings and Terminal Designations ................ 12

Integrated Display Terminal......................................... 13

Programming ............................................................... 15

Mode Access.......................................................... 15

Parameter Groups.................................................. 15

Access to Menus and Parameters ......................... 16

AUF Quick Menu....................................................... 17

AUF Quick Menu Parameters .............................. 18

Setting the Acceleration/Deceleration

Ramp Times ........................................................... 19

Setting the Macro Function .................................... 20

Setting the Mode of Operation ............................... 20

Command Mode Selection ..................................... 21

Frequency Mode Selection..................................... 21

Default Setting........................................................ 22

Forward/Reverse Run Selection ............................ 22

Maximum Frequency.............................................. 23

High Speed and Low Speed................................... 24

Nominal Motor Frequency and Voltage

Settings .................................................................. 24

V/Hz Control Mode Selection ................................. 25

Voltage Boost (Energy Recovery

Application Only) .................................................... 25

Electronic Motor Overload Protection..................... 26

Input Signal Selection ............................................ 28

Terminal Function Selection................................... 28

Jump Frequency (Jumping

Resonant Frequencies).......................................... 29

Switching Frequency.............................................. 30

Auto Restart ........................................................... 31

Drive Controller Fault Retention............................. 33

Output Phase Loss Detection ................................ 33

Input Phase Loss Detection ................................... 34

Avoiding Overvoltage Tripping ............................... 34

Undervoltage Fault................................................. 35

Changing the Display Parameter ........................... 36

Troubleshooting Fault and Alarm Codes..................... 37

Resetting the Drive Controller After a

Fault Condition ....................................................... 44

Appendix A—Input Terminal Functions....................... 45

Appendix B—Output Terminal Functions .................... 49

Appendix C—Receiving and Preliminary Inspection... 53

Storing and Shipping.............................................. 53

Lifting and Handling ............................................... 54

Precautions ............................................................ 54

Appendix D—Wiring Recommendations ..................... 60

Power Terminals .................................................... 63

Appendix E—Wiring Diagrams and

Parameter Settings...................................................... 65

LL (Lower Limit Frequency) ................................... 65

MODE KEY (LOCAL or REMOTE Keypad) ........... 65

MPS Rooftop with MicroTech II Controls for SAF and

EAF Applications.................................................... 66

Rooftop and Self-Contained with MicroTech II Controls

for SAF, RAF, and EAF Applications ..................... 69

Rooftop Controls by Others for SAF, RAF, and EAF

Applications............................................................ 72

Rooftop Energy Recovery Wheel Speed Control... 74

Introduction

This manual provides information about the McQuay MD2 variable speed drive (VFD) that was originally factory installed within a McQuay HVAC unit. The manual describes operation of the VFD along with descriptions and functions of the VFD parameters for the models and applications listed below.

Specific packaged equipment wiring schematics and parameter settings can be found in Appendix E—Wiring Diagrams and Parameter Settings on page 65. Please refer to the rooftop or self-contained installation manual and/or operation manual for information on the unit controller and its control of the variable speed drive.

A. Packaged Rooftop models RPS, RFS, RDT, RPE, and RDE

1. VFDs for supply, return and exhaust air fan speed control

a. Units with Mircotech II control

b. Units without Microtech II control

2. VFDs for energy recovery wheel speed control

B. Rooftop Air Handler models RDS and RAH

1. VFDs for supply, return and exhaust air fan speed control

a. Units with Mircotech II control

b. Units without Microtech II control

2. VFDs for energy recovery wheel speed control

C. Vertical Self-Contained models SWP and SWT, supply fan speed control

D. Commercial Packaged Rooftop Model MPS

1. For supply and exhaust air fan speed control

WARNING

UNINTENDED EQUIPMENT OPERATION

• Modifying or changing parameters whose function is not described in this manual will affect drive controller operation. Some register changes will take effect as soon as they are entered.

• Do not modify or change parameters whose function is not described in this instruction bulletin.

Failure to follow this instruction can result in death, serious injury, or equipment damage.

McQuay OM 844-1 3

Introduction

Applications With MicroTech II Control (A1a, A2, B1a, B2, C, and D)

The variable speed drive has been selected and coordinated with the McQuay air conditioning equipment’s unit controller. The drive that is installed on the McQuay packaged equipment has the parameters modified for the HVAC application. For the standard HVAC system design, no further modifications should need to be made to the drive.

Applications Without MicroTech II Controls (A1b and B1b)

The McQuay variable speed drive parameters must be changed to coordinate the drive with the unit controls and the system it is being installed on. This manual describes the parameters that should be reviewed and adjusted. Other parameters should not be adjusted.

Replacement VFD

When replacing a VFD, the owner/installer must determine which of the above listed applications applies and follow the appropriate procedures within this manual.

4 McQuay OM 844-1

Hazard Categories and Special Symbols

Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service, or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.

The addition of a lightning bolt or ANSI man symbol to a “Danger” or “Warning” safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed.

The exclamation point symbol is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

Symbol Name

Lightning Bolt

ANSI Man

Exclamation Point

DANGER

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

WARNING indicates a potentially hazardous situation which, if not avoided, can result in death, serious injury, or equipment damage.

CAUTION

CAUTION indicates a potentially hazardous situation which, if not avoided, can result in minor or moderate injury.

CAUTION

CAUTION, used without the safety alert symbol, indicates a potentially hazardous situation which, if not avoided, can result in property damage.

McQuay OM 844-1 5

Before You Begin

Read and understand these instructions before performing any procedure on this drive controller.

DANGER

HAZARDOUS VOLTAGE

• Read and understand this manual before installing or operating the MD2 drive controller. Installation, adjustment, repair, and maintenance must be performed by qualified personnel.

• The user is responsible for compliance with all international and national electrical code requirements with respect to grounding of all equipment.

• Many parts of this drive controller, including the printed circuit boards, operate at the line voltage. DO NOT TOUCH. Use only electrically insulated tools.

• Before servicing the drive controller:

— Disconnect all power.

— Place a “DO NOT TURN ON” label on all power disconnects.

— Lock all power disconnects in the open/off position.

• DO NOT touch unshielded components or terminal strip screw connections with voltage present.

• DO NOT short across terminals PA/+ and PC/- or across the DC bus capacitors.

• Install and close all covers before applying power or starting and stopping the drive controller.

• Disconnect all power, including external control power that may be present, before servicing the drive controller. WAIT 10 MINUTES to allow the DC bus capacitors to discharge. Then follow the DC bus voltage measurement procedure on page 7 to verify that the DC voltage is less than 45 V. The drive LEDs are not accurate indicators of the absence of DC bus voltage.

Failure to follow these instructions will result in death or serious injury.

CAUTION

IMPROPER DRIVE CONTROLLER OPERATION

• If the drive controller is de-energized for a prolonged period, the performance of the electrolytic capacitors will be reduced.

• Once a year, apply power to the drive controller for at least 5 hours to restore the performance of the capacitors, then check its operation.

• If the drive has not been powered for more than a year, do not connect the drive controller to the line voltage. Gradually increase the voltage using an adjustable AC source.

Failure to follow these instructions can result in injury and equipment damage.

6 McQuay OM 844-1

Before You Begin

DANGER

AUTOMATIC RESTART ENABLED

• This drive controller can restart under fault conditions.

• Equipment must be shut down, locked out and tagged out to perform servicing or maintenance.

Failure to follow this instruction will result in death or serious injury.

Bus Voltage Measurement Procedure

Before working on the drive controller, turn it off and wait 10 minutes to allow the DC bus to discharge and then measure the DC bus voltage.

DANGER

HAZARDOUS VOLTAGE

Read and understand the precautions in “Before You Begin” on page 6 before performing this procedure.

Failure to follow this instruction will result in death or serious injury.

The DC bus voltage can exceed 1,000 Vdc. Use a properly rated voltage-sensing device when performing this procedure. To measure the DC bus voltage:

1. Disconnect all power and wait 10 minutes to allow the DC bus to discharge.

2. Measure the voltage of the DC bus between the PA/+ and PC/– terminals to ensure that the voltage is less than 45 Vdc.

3. If the DC bus capacitors do not discharge completely, contact your local McQuay representative. Do not repair or operate the drive controller.

Figure 1: Capacitor Charging LED

Capacitor charging LED

RUN

PRG

MON

RUN STOP

Loc Rem

MODE

ENT

McQuay OM 844-1 7

Before You Begin

Initial Start-Up

Before providing power to the VFD, refer to the appropriate unit installation/maintenance manual(s) listed below:

• IM 738 for packaged rooftops with air-cooled condensers (RPS, RFS, and RDT)

• IM 487 for rooftop air handlers (RDS and RAH)

• IM 791 for packaged rooftops with evaporative condensers (RPE and RDE)

• IM 708 for one-piece self-contained units

• IM 709 for modular self-contained units

Perform the following (RPS/RDT example) general procedures on the specific unit purchased (yours may differ slightly depending on the unit)

1. Before closing (connecting) the power disconnect switch, open (disconnect) the following unit control circuit switches:

a. Turn system switch S1 to OFF

b. Turn system switch S7 to OFF

2. Confirm duct static pressure sensor SPS1 is connected to the ductwork.

3. Confirm the VFD lugs for the line voltage are tight.

4. Confirm the horsepower (hp) of the drive matches that of the motor.

Before starting the fan and VFD

1. Close the unit disconnect switch. With the control system switch S1 in the OFF position, power should be available only to the control circuit transformer (TI) and the compressor crankcase heaters.

2. Turn the Switch S1 to ON. Power should now be supplied to the control panel, and the LEDs on MCB1 should follow the normal startup sequence (refer to the “MCB LED Power-Up Sequence” of IM 696).

3. Verify all duct isolation dampers are open. Unit mounted isolation dampers may be mounted in the supply or return sections.

4. Place the unit into the “Fan Only” mode through the keypad menu System Summary\System\Ctrl Mode= Fan Only.

5. Confirm the power supply matches the setting of the J7J parameter.

6. Confirm the power supply frequency matches that of the J7 parameter.

7. Confirm the thermal protection level, tHr (or amps), matches that of the motor.

NOTE: All of the above parameters can be quickly found in the AUF Quick menu.

Start the fan and VFD

1. Turn Switch S7 to ON. The controller should enter the “Startup Initial” operating state. If the fan does not run:

a. Check fuses F1 and F3.

b. Check that the manual motor protectors or circuit breakers have not tripped.

c. Check the optional phase monitor.

2. If the fans are equipped with optional spring isolators, check the fan spring mount adjustment. When the fans are running they should be level.

3. Verify the rotation is correct.

4. Verify the DHL safety is opening at a pressure compatible with duct working pressure limits.

NOTE: Refer to the unit IMs for additional non-VFD instructions.

8 McQuay OM 844-1

Control Terminals

The control terminals are illustrated in Figure 2 (refer to Appendix E—Wiring Diagrams and Parameter Settings for more details).

Figure 2: Control Terminals

SOURCE

PLC

SINK

SW4

PLC

P24 CC

SW4

F R RES FM

Connector (RJ45)

FLA FLB FLC R Y RC

FM VIA

VIV

SW2 SW3

PP VIA VIB CC

Factory settings:

SW4:

FM: V side

VIA: V side

•

• Tightening torque: 0.6 Nm

SOURCE side (positive)

Maximum wire size: 2.5 mm² (AWG 14)

(5.3 lb.in)

DANGER

UNINTENDED EQUIPMENT OPERATION

• The accidental grounding of logic inputs configured for Sink Logic can result in unintended activation of drive controller functions.

• Protect the signal conductors against damage that could result in unintentional conductor grounding.

• Follow NFPA 79 and EN 60204 guidelines for proper control circuit grounding practices.

Failure to follow these instructions will result in death or serious injury.

WARNING

RISK OF IMPROPER OPERATION

The MD2 logic input selector switch (SW4) is factory-set to the source position. The switch should never be moved to the PLC or sink position.

Failure to follow this instruction can result in death or serious injury.

McQuay OM 844-1 9

Control Terminals

Table 1: Control Terminal Characteristics

Terminals Function Characteristics

External

PLC

power supply input

P24

Internal supply

CC Common 0 V common (2 terminals)

FLA, FLB, FLC

Configurable relay outputs

RY, RC

Logic inputs

RES

Analog output

Internal

supply available

+24 Vdc input for external power supply for logic inputs Max. permissible voltage: 50 Vac

Short-circuit and overload protection:

24 Vdc supply (min. 21 V, max. 27 V), maximum current: 200 mA

One relay logic output, one N/C contact, and one N/O contact with common point Minimum switching capacity: 3 mA for 24 Maximum switching capacity:

• On resistive load: 5 A for 250 Vac or 30

• On inductive load: 2 A for 250 Vac or 30

Max. response time: 7ms ± 0.5ms Electrical service life: 100,000 operations

One relay logic output, one N/O contact Minimum switching capacity: 3 mA for 24 Maximum switching capacity:

• On resistive load: 5 A for 250 Vac or 30

• On inductive load: 2 A for 250 Vac or 30

Max. response time: 7ms ± 0.5ms Electrical service life: 100,000 operations

Three programmable logic inputs, 24 level 1 PLC, IEC 65A-68 standard Impedance: 3.5 kΩ Maximum voltage: 30 V Max. sampling time: 2 ms ± 0.5 ms Multiple assignment makes it possible to configure several functions on one input

Positive logic (Source): State 0 if ≤ 5 V or logic input not wired, state 1 if ≥ 11 V

Negative logic (Sink): State 0 if ≥ 16 V or logic input not wired, state 1 if ≤ 10 V

One switch-configurable voltage or current analog output:

• Voltage analog output 0–10 Vdc, minimum load impedance 470 Ω

• Current analog output X–Y mA by programming X and Y from 0 to

20 mA, maximum load impedance: 500 Ω

Max. sampling time: 2 ms ± 0.5 ms Resolution: 10 bits Accuracy: ± 1% for a temperature variation of 60°C Linearity: ± 0.2%

Short-circuit and overload protection:

One 10.5 Vdc ± 5% supply for the reference potentiometer (1 to 10 kΩ), maximum current: 10 mA

Vdc

, compatible with

10 McQuay OM 844-1

Table 1: Control Terminal Characteristics (continued)

Terminals Function Characteristics

Switch-configurable voltage or current analog input:

• Voltage analog input 0–10 Vdc, impedance 30 kΩ (max. safe

voltage: 27 Vdc +/- 3 Vdc)

• Analog current input X–Y mA by programming X and Y from 0 to

20 mA, with impedance 242 Ω

Max. sampling time: 2 ms ± 0.5 ms Resolution: 11 bits Accuracy: ± 0.6% for a temperature variation of 60°C Linearity: ± 0.15% of the maximum value

•

0–10

Vdc

, impedance 30 kΩ (max. safe voltage 27 Vdc)

• Max. sampling time: 2 ms ± 0.5 ms

• Resolution: 11 bits

• Accuracy: ± 0.6% for a temperature variation of 60°C

• Linearity: ± 0.15% of the maximum value

VIA

VIB

Analog/logic input

Analog input Voltage analog input:

Control Terminals

McQuay OM 844-1 11

Switch Settings and Terminal Designations

Figure 3: Switches

Voltage/current selection for analog I/O (FM and VIA)

SW4

Source (positive logic)

PLC Sink (negative logic)

SW4

V (voltage)

Selection of logic

type

FM VIA

V (voltage)

I (current)I (current)

SW2 SW3

NOTE: Refer to Appendix E—Wiring Diagrams and Parameter Settings on page 65 for your specific HVAC application and switch settings.

NOTE: The logic input switch SW4 is set to the source position. The switch should never be moved to the PLC or sink position.

DANGER

UNINTENDED EQUIPMENT OPERATION

• The accidental grounding of logic inputs configured for Sink Logic can result in unintended activation of drive controller functions.

• Protect the signal conductors against damage that could result in unintentional conductor grounding.

• Follow NFPA 79 and EN 60204 guidelines for proper control circuit grounding practices.

Failure to follow these instructions will result in death or serious injury.

Table 2: Drive Controller Default Terminal Function Assignments

Terminal Function

FLA-FLB-FLC relay

RY-RC relay

F Forward (2-wire control)

R Preset speed

RES Fault reset

VIA Speed reference 0-10 Vdc

VIB Not assigned

FM Output frequency

De-energized in the event of a fault or when the power supply is disconnected

Energized when the speed is greater than or equal to low speed (LL)

12 McQuay OM 844-1

Integrated Display Terminal

The LEDs and keys on the integrated display terminal are illustrated in Figure 4.

Figure 4: Description of Display Terminal

RUN

PRG

MON

Loc Rem

RUN STOP

MODE

ENT

NOTE: Display terminal functions described above reflect VFD default settings.

Table 3: Display Terminal Features

LED/Key Characteristics

1 Display RUN LED

2 Display PRG LED

3 Display MON LED

4 Display unit Four digits, seven segments

5 Display unit LED

6 Navigation arrows

7 Arrow LED

8 Loc/Rem LED Illuminates when Local mode is selected

9Mode

10 Loc/Rem key Switches between Local and Remote modes

11 ENT

12 RUN LED Illuminates when the Run key is enabled

• Illuminates when a run command is applied to the drive controller

• Flashes when there is a speed reference present

• Illuminates when Adjustment mode is active

• Flashes in AUF–Gr.U modes

• Illuminates when Monitoring mode is active

• Flashes in fault record display mode

• The % LED illuminates when a displayed numeric value is a

percentage

• The Hz LED illuminates when a displayed numeric value is in hertz

Depending on the mode, you can use the arrows to:

• Navigate between the menus

• Change a value

• Change the speed reference when the Arrow LED (7) is lit

Illuminates when the navigation arrows are controlling the speed reference

Press to select the Mode (see Figure 5)

• Display mode (default)

• Adjustment mode

• Monitoring mode

Can also be used to go back to the previous menu

Press to display a parameter’s value or to save a changed value

McQuay OM 844-1 13

Integrated Display Terminal

Table 3: Display Terminal Features (continued)

LED/Key Characteristics

13 RUN

14 STOP

Pressing this key when the RUN LED is illuminated starts the drive controller

Stop/reset key

In Local mode (see table item #10), pressing the STOP key decelerates the drive to a stop

In Remote mode (see table item #10), while the VFD is being controlled by the unit controller, pressing the STOP key will allow the drive to freewheel stop (drive display will indicate a flashing “E”)

If F735 is set to 0 (default setting), pressing the stop key twice will reset the flashing “E” fault and other resettable faults if the fault condition has been resolved

DANGER

STOP BUTTON CAN CAUSE MOTOR RESTART

• The Stop Button on this drive controller can reset faults and restart the motor if an active run command is present.

• Disable all run commands and inspect the drive system for the cause of the fault before activating a fault reset.

• Disable the panel reset operation (F735) to remove this hazard.

Failure to follow these instructions will result in death or serious injury.

14 McQuay OM 844-1

Programming

Mode Access

MD2 drive controllers have three modes of operation described in Table 4.

Table 4: Mode Descriptions

Display mode (default)

Adjustment mode

Monitoring mode

• Active when power is applied to the drive controller

• Use to display drive controller parameters, alarms, and faults

• Use to modify drive controller parameters

• Use to monitor drive controller status

Figure 5 illustrates how to access the modes with the display terminal MODE key.

Figure 5: Mode Access

RUN

Display mode

(default)

60.0

MODE

PROG

Adjustment

mode

AUF

Monitoring

MODE MODE

mode

Fr-F

MON

Parameter Groups

MD2 drive controllers are factory programmed per your HVAC application (refer to Appendix E—Wiring Diagrams and Parameter Settings for your application options and settings).To restore McQuay factory settings, use parameter “tYp” (see Default Setting on page 22).

WARNING

UNINTENDED EQUIPMENT OPERATION

• Any parameter values altered from the VFD control panel will affect the operation of the drive.

• If parameter “ parameters will be transferred into the VFD memory and may affect safe operation of the equipment.

Failure to follow this instruction can result in death, serious injury, or equipment damage.

tYp” is selected and changed, altered

Table 5: MD2 Parameter Groups

Parameter Type Description

Basic parameters Parameters that need validation before using the drive controller.

Extended Parameters (menu F---)

User Parameters (menu Gr.U.)

Quick menu (menu AUF) Subset of Basic and Extended parameters frequently used.

History Parameters (menu AUH)

McQuay OM 844-1 15

Parameters for special settings and applications.

Subset of Basic and Extended parameters whose values have changed from the VFD default settings.

Subset of Basic and Extended parameters displaying the five parameters that were last changed, displayed in reverse chronological order.

Programming

Access to Menus and Parameters

Figure 6 illustrates how to access menus.

Figure 6: Menu Access

Display

Mode

RUN

MOD

60.0

Adjustment

Mode

AUH

PROG

MOD

AUF

Monitoring

Mode

Fr-F

Figure 7: Access to Parameters

AU1

ENT

ACCAUF

GrU

F---

Basic

Parameters

AUF

AU1

10.1

NOTE: Press the MODE key to go back to the previous level. For example:

— To go from 9.9 to

dEC

— To go from

AUF

dEC

ENT

dEC

9.9

ENT

Confirm value

16 McQuay OM 844-1

AUF Quick Menu

Figure 8 illustrates the parameters accessible from the AUF Quick menu.

Figure 8: AUF Quick Menu Parameters

ENT

HEAD

AU1

ACCAUF

dEC

tHr

Top of list

Automatic ramp adaptation

Acceleration ramp times

Deceleration ramp times

Minimum motor frequency

Maximum motor frequency

Motor thermal protection

Analog output scaling

Motor control profile

uLu

END

Nominal motor frequency

Nominal motor voltage

End of list

McQuay OM 844-1 17

AUF Quick Menu

AUF Quick Menu Parameters

Table 6 describes the parameters that can be accessed from the AUF Quick menu. With the exception of ACC and dEC, the parameters cannot be modified while the drive controller is running.

Table 6: AUF Quick Menu Parameters

Code Description Unit Adjustment Range

ACC Acceleration time Seconds 0.0 to 3200

dEC Deceleration time Seconds 0.0 to 3200

tHr

FN Analog output scaling — Do not use

uLu

Frequency lower limit (minimum motor frequency)

Frequency upper limit (maximum motor frequency)

Motor electronic thermal protection level in amperes. Adjust tHr to the nominal current value which appears on the motor nameplate.

Selection of Volts/Hz control mode (motor control profile)

Base frequency (nominal motor frequency)

Voltage at base frequency (nominal motor voltage)

In is the nominal drive current shown on the drive controller nameplate.

Hz 0.0 to uL

Hz 0.5 to 200.0

A 0.1 to 1 times In

0: V/Hz profile constant torque 1: V/Hz profile variable torque 2: Automatic voltage boost

—

Hz 25 to 200.0

3: Flux vector control 4: Energy saving 6: Permanent magnet synchronous motor

50 to 330 (230 V drive controllers) 50 to 660 (460 V drive controllers)

NOTE: With the exception of drive controller is running.

18 McQuay OM 844-1

ACC

and

dEC

, the parameters cannot be modified while the

Setting the Acceleration/Deceleration

O f

Output

Ramp Times

AUF Quick Menu

-<$

Acceleration/deceleration ramp adaptation. Automatically adjusts the acceleration/deceleration ramp times to match the inertia of the load.

-//

Programs the time it takes for the drive controller output frequency to go from 0 Hz to the maximum frequency (parameter FH).

@1/

Programs the time it takes for drive controller output frequency to go from maximum frequency (parameter FH), to 0 Hz.

Table 7: Setting Ramp Time Parameters

Parameter Name Range

AU1

Automatic Acceleration/ Deceleration Ramp Adaptation

0: Disabled 1: Automatic 2: Automatic acceleration only (Do not use)

ACC Acceleration Time 1 0.0 to 3200 s

dEC Deceleration Time 1 0.0 to 3200 s

See Appendix E—Wiring Diagrams and Parameter Settings on page 65 for McQuay settings.

Acceleration/Deceleration Ramp Adaptation

• AU1 = 0: Function is disabled.

• AUI = 1: Automatically adjusts the acceleration and deceleration ramp times

from 1/8–8 times the value set in the ACC or dEC parameters, depending on the current rating of the drive controller.

• AUI = 2: Do not use.

Figure 9: Automatic Ramp Adaptation

utput

requency (Hz)

When load is small ... When load is large ...

Acceleration

Time

shorten acceleration/deceleration time. lengthen acceleration/deceleration time.

Deceleration

Time

frequency (Hz)

Time (seconds)

Acceleration

Time

Deceleration

Time

Time (second

McQuay OM 844-1 19

AUF Quick Menu

Manually Setting Acceleration/Deceleration Ramp Times

During startup, confirm parameters ACC and dEC match the parameters in Appendix E—Wiring Diagrams and Parameter Settings.

Figure 10: Manually Setting the Acceleration/Deceleration Ramp Times

Output frequency (Hz)

ACC dEC

AUI=0 (Manual)

Time (seconds)

Setting the Macro Function

-<'

Table 8: Parameter AU4

Parameter Name

AU4 Macro Function

NOTE: The current setting of this parameter is shown on the left side of the display. The number 0 is always displayed on the right. For example, indicates that the freewheel stop setting is enabled.

Sets the drive controller to one of four macro configurations. The macro configuration selection automatically determines the settings of the following parameters: CMOd, FMOd, F110–F113, and F201.

Range (refer to Appendix E—Wiring Diagrams and Parameter Settings for values)

0: Disabled 1: Freewheel stop 2: 3-wire operation 3: + - speed from logic input(s) 4: 4–20 mA current input operation

Setting the Mode of Operation

In Remote mode, start and stop commands and the frequency are determined by the settings of CMOd (Command mode) and FMOd (Frequency Setting mode).

LOC

When Local mode is selected with the key, start/stop commands and frequency settings can only be made from the display terminal. The Local LED illuminates while Local mode is selected. See page 13 for Local/Remote key operation and Local LED.

When service is complete, return the VFD to the remote mode.

WARNING

UNINTENDED EQUIPMENT OPERATION

• Modifying or changing parameters whose function is not described in this manual will affect drive controller operation. Some register changes will take effect as soon as they are entered.

• Do not modify or change parameters whose function is not described in this instruction bulletin.

Failure to follow this instruction can result in death or serious injury.

20 McQuay OM 844-1

REM

Command Mode Selection

AUF Quick Menu

CNOd

Specifies which command source has priority in issuing Start and stop commands.

NOTE: You must stop the drive controller before changing the setting of

CMOd

Table 9: Parameter CMOd

Parameter Name Range

0: Terminal board 1: Display terminal 2: Serial communication

CNOd

Command Mode Selection

• CMOd = 0: Start and stop commands via the logic inputs on the control terminal board.

• CMOd = 1: The and keys on the display terminal start and stop the drive controller.

• CMOd = 2: The serial link sends start and stop commands to the drive controller.

Some functions, when assigned to an input terminal, are commanded by the input terminal even if CMOd is set to 1 (display terminal).

Priority commands via a serial link can take precedence over the setting of CMOd.

Frequency Mode Selection

289@

command.

Table 10: Parameter FMOd

Specifies which input device has priority in issuing a speed reference

Parameter Name Range

1: VIA 2: VIB (not used with McQuay

FNOd

NOTE: You must stop the drive controller before changing the setting of operation is allowed with all settings of

Frequency Mode Selection

controls) 3: Display terminal 4: Serial communication (not used with McQuay controls) 5: +/- speed from logic input(s)

FMOd

. Preset speed

• FMOd = 1: Speed Reference command via analog input terminal VIA (0-10 Vdc or 4-20 mAdc).

• FMOd = 2: Speed Reference command via analog input terminal VIB (0-10 Vdc)

- not used with McQuay controls.

• FMOd = 3: Speed reference via the and arrow keys on the display terminal or the optional remote keypad.

• FMOd = 4: Speed reference via serial communication link - not used with McQuay controls.

• FMOd = 5: Speed reference from +/- speed from logic input(s)

McQuay OM 844-1 21

AUF Quick Menu

Default Setting

tYp

This parameter provides a variety of functions to reset, restore and save

parameter settings.

WARNING

UNINTENDED EQUIPMENT OPERATION

• Drive controller default parameter settings will be substituted for the present settings when value 3 (standard default settings) of thetYP parameter is selected.

• Drive controller default parameter settings may not be compatible with the application.

• Contact McQuay product support before initiating standard default settings.

Failure to follow these instructions can result in death, serious injury, or equipment damage

Table 11: Parameter tYP

Parameter Name Range

0: 1: 50 Hz default 2: 60 Hz default 3: Standard default settings (Initialization)

tYp Default Setting

4: Clear the fault record 5: Clear the cumulative operation time 6: Initialize the type information 7: Save the user-defined parameters (do not use)* 8: Recalls your McQuay defined parameters 9: Clear the cumulative fan operation time

* You may replace McQuay parameters if this is used.

NOTE: You must stop the drive controller before changing the setting of

NOTE: The following parameters are not affected by settings 1, 2, and 3:

FN, FNSL, F109, F470F473

NOTE: The setting display of this parameter contains two numbers. The left-most number displays the last operation performed. The right-most number indicates the pending operation and should be adjusted for the action desired.

, and

F880

tYP

Forward/Reverse Run Selection

keypad display.

Table 12: Parameter 2H

Parameter Name Range

NOTE: For more information, contact your McQuay representative.

22 McQuay OM 844-1

Programs the direction of motor rotation when starting the drive from the

Forward/ Reverse Run Selection

0: Forward run 1: Reverse run (do not use) 2: Forward run with forward/ reverse switching (do not use) 3: Reverse run with forward/reverse switching (do not use)

Maximum Frequency

AUF Quick Menu

Programs the maximum output frequency of the drive controller. This value is used as the maximum frequency reference for the acceleration and deceleration ramps.

CAUTION

UNINTENDED EQUIPMENT OPERATION

• Do not use above 60Hz.

Failure to follow this instruction can result in equipment damage.

Table 13: Parameter FH

Parameter Name Range

NOTE: You must stop the drive controller before changing the setting of FH.

Figure 11: Maximum Frequency

Output frequency (Hz)

Maximum Frequency

80 Hz

60 Hz

30–200 (Hz)

When FH = 80 Hz

When FH = 60 Hz

NOTE:

can not be adjusted during operation

value can not exceed FH value.

100 % Frequency setting signal (%)

McQuay OM 844-1 23

AUF Quick Menu

High Speed and Low Speed

Programs the high speed.

Programs the low speed.

Table 14: Parameters UL and LL

Parameter Name Range

UL High Speed 0.5–FH (Hz)

LL Low Speed 0.0–UL (Hz)

Figure 12: High speed and low speed

High Speed Low Speed

Output frequency (Hz) Output frequency (Hz)

0 100 %

Speed Reference signal Speed Reference signal

100 %

Nominal Motor Frequency and Voltage Settings

J7, J7J

Table 15: Parameters J7 and J7u

Parameter Name Range

uLu Voltage Setting

Figure 13: Nominal motor frequency and voltage settings

uLu

Output voltage (V)

Use these parameters to set the nominal motor frequency (uL) and voltage settings (uLu) to the motor nameplate values.

Nominal Motor Frequency

Output frequency

25.0–200.0 Hz

50.0–330 V: 200 V Class

50.0–660 V: 400 V Class

24 McQuay OM 844-1

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