Daikin ACS320 User Manual

Swapped Wires
If the communication wires are swapped (terminal A on one
drive is connected to terminal B on another):
• The value of 5306 EFB OK MESSAGES does not
advance.
• The values of 5307 EFB CRC ERRORS and 5308 EFB
UART ERRORS are advancing.
To correct:
Check that the EIA-485 lines are not swapped.
Fault 28 – Serial 1 Err
If the drive’s control panel shows fault code 28 “SERIAL 1
ERR”, check for either of the following:
• The master system is down. To correct, resolve problem
with master system.
• The communication connection is bad. To correct, check
communication connection at the drive.
• The time-out selection for the drive is too short for the
given installation. The master is not polling the drive
within the specied time-out delay.
To correct:
Increase the time set by parameter 3019 COMM FAULT TIME,
page 53.
Fault 31 – EFB1
For BACnet: If the drive’s control panel shows fault code 31
“EFB1”, the drive has aninvalid Device Object Instance ID. To
correct, use parameters 5311 and 5317 and establish a unique
drive ID that is in the range 1 to 4,194,303.
Faults 31…33 – EFB1…EFB3
Except as noted above, these three EFB fault codes (listed for
the drive in “Diagnostics” in the ACH550 User’s Manual, fault
codes 31…33) are not used.
Intermittent Off-line Occurrences
The problems described above are the most common
problems encountered with MD4 serial communication.
Intermittent problems might also be caused by:
• Marginally loose connections,
• Wear on wires caused by equipment vibrations,
• Insufcient grounding and shielding on both the devices
and on the communication cables.
OM 1190-1 • MD4 VFD 82 www.DaikinApplied.com
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Daikin ACS320 Specifications

General

Brand	Daikin
Model	ACS320
Category	Controller
Language	English