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Fig. 38 — Typical Wiring Diagram - Split System Air-Handling Unit (40RU with ACH550/ACH580 VFD shown)
VFD ALARMS AND FAULTS TROUBLESHOOTING
The VFD has two LEDs ACH550/ACS320 or only one LED
ACH580 on its front panel that indicate VFD operating status.
These LEDs are GREEN and RED.
•
GREEN LED ON STEADY: Power ON to VFD
•
GREEN LED FLASHING: Alarm condition detected
•
RED LED ON (Steady or Flashing): Fault condition detected
Alarms
Alarms are advisory in nature. These indicate a problem has been
detected by the VFD's diagnostics, but this problem will not re-
quire that the VFD and its motor be shut down. Typical fault con-
dition on the SAV™ application might be loose connections at the
VFD terminal board or damaged conductors between the Fan
Speed Board connector J2 and the VFD terminal strip. For
ACH550/ACS320 units see Table 34 on page 67 for list of alarm
codes. For ACH580 units see Table 35 on page 73.
CLEAR THE ALARM LED
Shut off power to the VFD for five minutes. Restore power and
recheck the GREEN LED. If this LED is still flashing, connect the
accessory remote display keypad kit and follow the troubleshoot-
ing
instructions.
For
"ACH550/ACS320 VFD Diagnostics" on page 65. For ACH580
units see "ACH580 VFD Diagnostics" on page 72.
Faults
A fault is a significant internal situation for the VFD or its motor.
If the motor was running when the fault was detected, it was
shutdown. For ACH550/ACS320 units see Table 33 on page 66,
for ACH580 units see Table 35 on page 73. Connect the accesso-
ry remote display keypad kit and follow the troubleshooting in-
structions. For ACH550/ACS320 units see "ACH550/ACS320
VFD Diagnostics" on page 65. For ACH580 units see "ACH580
VFD Diagnostics" on page 72.
CLEAR THE FAULT LED
Shut off power to the VFD for five minutes. Restore power and re-
check the RED LED.
29
ACH550/ACS320
units
see
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