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Troubleshooting Guide - Advance Split Ducted Unit
Doc. 9590-2015-03 Ver. 3 221111
Troubleshooting Guide
Advance Split Ducted Unit
Fault Code
Description
Possible Causes
Remedies
E70 VSD Lost
Rotor Position
Lost Rotor Position
Check the U/V/W
connections on drive side.
Make them correct.
Check the compressor
motor windings
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
System over charge
Make it correct.
E71 VSD Motor
Temp Sensor
Error
AC Input Current Fold Back Timeout
Check if the line voltage if it
is < 187VAC
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
Faulty drive
Replace drive.
E76 VSD Power
Module Temp.
Fold Back
Timeout
Power Module Temp. Fold Back Timeout
Verify proper airflow over
the heat-sink of the drive.
Remove any obstructions.
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
Check the mounting screws
on the drive, If the problem,
still persists replace the
drive.
Make sure they are tight.
E78 VSD
Auto Config
Communication
Timeout
Auto Config Communication Fault Timeout.
Baud rate or Parity of the system controller not
matching with drive.
Drive is not configured.
Replace the drive
E82 VSD Power
Module Temp
High
Power Module Temp. High
Verify proper airflow over
the heat-sink of the drive.
Remove any obstructions.
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
Check the mounting screws
on the drive, If the problem,
still persists replace the
drive.
Make sure they are tight.
E85
Communication
Error in VSD
Between Comms
to DSP
COM MCU and DSP Communication Lost
Check mod-bus
communication cable
connections.
Refer wiring diagram &
correct it.
Faulty drive
Replace the drive.
E86 Compressor
Phase Current
Imbalance
Compressor Phase Current Imbalance
Check the U/V/W
connections on drive side.
Make them correct.
Check the compressor
motor windings
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
System over charge
Make it correct.
