Commissioning The Unit; Check Internal Jumpers - Carrier 19XRV Start-Up And Service Instructions

Commissioning the Unit

The commission procedure is as follows:
1. If the chiller has been stored outdoors, allow at least 24 hours
room temperature stabilization prior to commissioning.
Ensure any condensation that occurs as a result of the ambi-
ent temperature is allowed to evaporate.
2. Enter parameters in the VFD Configuration screen.
3. Install surge suppression devices if required.
4. Review the power wiring and grounding to ensure that it
has been properly connected.
5. Visually examine the inside of the drive enclosure to:
a. Look for signs of corrosion or moisture residue.
b. Remove any dirt or debris.
c. Make sure all vents are clear.
6. Apply power to the drive and take thermal measurements
of the capacitor bank and power connections. Do this
again before start-up.
7. Measure and record the incoming line voltage. Line-to-
line voltages should be balanced within 3% as calculated
by Rockwell's procedure below:
Measure voltages phase-to-phase and phase-to-ground.
Vmax = Maximum measured phase-to-phase voltage
(A to B, B to C, C to A)
Vmin = Minimum measured phase-to-phase voltage
Imbalance Calculation Formula
Vavg =
Imbalance % =
(VAB + VBC + VCA)
3
(Vmax – Vmin) x 100
Vavg
8. Take a final thermal measurement of the capacitor bank
and power after finalizing the installation to ensure all
connections are good.
9. If a ground fault occurs, then do the following:
a. Check for a ground in the motor or motor wiring.
b. Check wiring insulation for damage and check that wir-
ing is dry.
c. Verify the motor wiring is separated from ground and
there is no connection between phases.
d. Check for failed IGBTs.
10. If an overcurrent fault occurs, then do the following:
a. Check for excessive load and verify load limit settings
on the HMI.
b. Check motor and wiring insulation.
c. Check parameter settings on UM VFD Configuration for
PIC6.

Check Internal Jumpers

On the Main VFD Control board there are 2 jumpers labeled J1
HARDWARE ENABLE and J2 SAFETY ENABLE. J1 should
be removed and J2 should be in place. See Fig. 12.
Two jumper wires connect a particular terminal to chassis ground.
The MOV and AC EMI jumper should be connected to the PE-A
terminal. The COMMON MODE CAPACITORS to GROUND
jumper should be connected to a standoff rather than the PE-B
terminal.
Use the recommended tools as follows when connecting jumper
wires in Frame 6 and in Frame 7:
• Recommended torque (screws and nuts) = 1.36 N∙m (120.0 lb∙in.)
• Recommended hex socket = 7 mm
• Recommended screwdriver = T20 star type
See Fig. 13 and Fig. 14 for the correct positions of the jumpers.
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