Vfd Control Verification (Non-Running); Vfd Control Verification (Running) - Carrier AquaEdge 19XR series Start-Up, Operation And Maintenance Instructions Manual

5. Scroll down and select the ISM_CONF DATA screen to
modify or view the ISM parameters:
DESCRIPTION
STARTER TYPE 3
(3 = VFD)
MOTOR RATED VOLTAGE from "Load Side" section
LINE VOLTAGE of the VFD enclosure nameplate.
MOTOR RATED CHILLER FL AMPS from "Line Side"
LOAD AMPS section of the VFD enclosure
nameplate
MOTOR LOCKED MOTOR LRA from "Load Side" sec-
ROTOR TRIP tion of the VFD enclosure nameplate
STARTER LRA RATING 600 for VFD
part #19XVR0414XXX
750 for VFD
part #19XVR0500XXX
900 for VFD
part #19XVR0643XXX
MOTOR CURRENT 163 (500A and 643A VFDs)
CT RATIO:1 120 (414A VFDs)
3 GRND FAULT CT? NO
(1=NO)
FREQUENCY-60HZ YES for 60 Hz selection
(YES=60) NO for 50 Hz selection
6. Press to the softkey to save changes when exiting
SAVE
the ISM_CONF screeen.
7. Press the softkey to and exit the ISM Configura-
EXIT
tion Screen.
VFD Enable Configuration — To access the parameters:
1. Press .
MENU
2. Press .
SERVICE
3. Select EQUIPMENT SERVICE.
4. Scroll down and select SETUP2.
5. Verify the following parameters:
VFD OPTION ENABLED
VFD CURRENT LIMIT MOTOR FLA from "Load Side" section
of the VFD enclosure nameplate
Configure Surge Parameters
1. Press .
MENU
2. Press .
SERVICE
3. Select EQUIPMENT SERVICE and OPTIONS to verify
that the parameters in the applicable table below match
the surge prevention parameters for the design conditions
of the chiller. These parameters are found on a label on
the bottom surface of the inside of the chiller control
panel.
DESCRIPTION
SURGE/HGBP Surge parameter label
DELTA TSMIN
SURGE/HGBP Surge parameter label
IGVMIN
SURGE/HGBP Surge parameter label
DELTA TSMAX
SURGE/HGBP Surge parameter label
IGVMAX
SURGE LINE Surge parameter label
SHAPE FACTOR
VFD CONTROL VERIFICATION (NON-RUNNING) —
In order to verify and, if necessary, tune the speed control sig-
nal of the chiller controller to the VFD (ISM terminal J8-1
labeled 4-20 mA OUT VFD) and the speed feedback signal
from the VFD to the chiller controller (ISM terminal J8-2
labeled VFD HZ), follow the steps below.
Set TARGET VFD SPEED to 0%.
1. Press .
MENU
SETTING
SETTINGS
78
2. Press .
STATUS
3. Press .
COMPRESS
4. Press .
SELECT
5. Set TARGET VFD SPEED to 0%.
Verify that the VFD SPEED REFERENCE shown on the
VFD display is within 0 to 1 Hz of zero.
1. Press the ENTER softkey on the VFD keypad until all
LEDs on the left side of the keypad are illuminated ex-
cept the Password LED.
NOTE: The value shown in the VFD display is the fre-
quency at which the VFD is being commanded to
operate. This value is called the VFD Speed reference.
2. Verify that the actual speed signal feedback to the chiller
controller is 0% by accessing the ACTUAL VFD SPEED
in the ICVC COMPRESS screen.
3. Verify ACTUAL VFD SPEED is 0% to 1% on the ICVC.
Set TARGET VFD SPEED to 100%.
1. Press .
MENU
2. Press .
STATUS
3. Press COMPRESS .
4. Press .
SELECT
5. Set TARGET VFD SPEED to 100%.
Verify that the VFD Speed Reference shown on the VFD
display corresponds to the 50 or 60 Hz setting (100% TARGET
VFD SPEED).
1. Confirm that the VFD Speed reference displays the TAR-
GET VFD SPEED frequency within ± 1 Hz.
2. Release the TARGET VFD SPEED so that it can operate
in automatic mode. (Refer to Override Operations Sec-
tion on page 23.)

VFD CONTROL VERIFICATION (Running)

Preparation
1. Disconnect power to the VFD. Verify that the branch dis-
connects or other local disconnects are open and properly
tagged out.
2. Connect a voltmeter and ampmeter to the line side of the
VFD. Locate meters safely away from the power cables.
3. Reconnect power to the VFD.
4. Measure the voltage on the line side of the drive.
5. Verify it is within 10% of the chiller nameplate voltage.
6. Set up the ICVC set point per the requirements of the job.
7. Start the chiller and verify the rotation of the compressor
just as it starts.
8. Allow the chiller to load up. Verify that the chiller loads
up smoothly.
NOTE: One or two surges may be counted during the first
minute of operation.
Verify That Actual VFD Speed is 100% (±2%)
1. Set the TARGET VFD SPEED in the COMPRESS screen
to 100%.
2. Verify that the ACTUAL VFD SPEED is 100% (± 2%).
3. Leave running for the next test.
ISM Current Calibration Check
1. With the TARGET VFD SPEED at 100%, load the chiller
so that the ICVC default display shows 75% to 100% un-
der the display title AMPS %. A higher load is preferred.
2. Measure the incoming current of all three input phases
with a separate true RMS amp meter.