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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
E50 Outdoor
Board
Configuration
Error
UNO Board has not been configured.
Outdoor board is not
configured
Configured the outdoor
board correctly
E51
Communication
Error Between
ODU to VSD
Communication between outdoor and indoor
board.
Outdoor board has not been configured
correctly.
Faulty outdoor and indoor
board or cable.
Outdoor board is not
configured.
Replace the faulty board.
Configured the outdoor
board correctly.
E52 Fault
IDU - Wall
Control
Communication
Error
Communication error between wall control and
indoor board.
Faulty wall controller or
cable
Replace faulty wall controller
or cable
Conflicting address with
controller assignment or
two controls have the same
assignment number
Re-assign controllers
correctly
E55
Communication
Error Between
BMS to ODU
ICUNO-MOD to Outdoor Board
Communication Fault.
Faulty ICUNO-MOD
Replace faulty ICUNO-MOD
Incorrect Control Mode set
on Outdoor Board
Ensure correct control
mode is set
E56 No Master
Wall Control
Detected
No Master Wall Control (C-1) is detected.
System will lock out until a C-1 assignment is
detected.
Master Controller
(C-1) Faulty
If an additional Wall Control
(C-2 or C-3) is available,
remove the faulty Master
controller and re-assign one
of the available controllers
to C-1
Connected controller/s have
not been assigned as C-1
Re-assign a connected
controller to C-1
E60 VSD
Compressor
Phase Over
Current
Compressor Phase Over Current
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.
Sensor on Drive not reading
properly
Replace Drive
E62 VSD DC Bus
Over Voltage
DC Bus Over Voltage
Check the DC bus voltage if
it is > 800VDC.
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
E63 VSD DC Bus
Under Voltage
DC Bus Under Voltage
Check the DC bus voltage if
it is < 300VDC.
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
