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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
E18 Suction Temp.
Sensor Error
(Open/short
circuit)
The reading of the suction temperature sensor
(Sst) is not within the specified sensor range.
Suction temperature sensor
is open or short circuit.
Replace suction temperature
sensor.
Faulty sensor.
Check the sensor resistance.
E22 Ambient
Temp. Sensor
Error (Open/
short circuit)
The reading of the ambient temperature sensor
is not within the specified sensor range.
Ambient temperature sensor
is open or short circuit.
Replace ambient
temperature sensor.
Faulty sensor.
Check the sensor resistance.
E26 VSD Supply
Over Current
The drive has encountered an over current
event and has stopped operation.
An over current can be
triggered by low voltage.
Rectify low voltage power
supply.
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 if the problem
still persists.
E27 VSD Supply
Over Voltage
The drive has encountered an over voltage
event.
Measure the input voltage
to the drive. It should not be
more than 575VAC.
Input voltage should be
rated value range.
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
E28 VSD
Temperature
High
The drive has encountered an over temperature
condition and has stopped operation.
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.
E29 VSD Low
Supply Voltage
The drive has encountered an under-voltage
event.
Measure the input voltage to
the drive. It should not drop
below 295VAC.
Input voltage should be
rated value range.
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits.
E30 VSD Trip Lock
Certain faults have a trip limit
VCD Drive trips lock because
of multi errors. Refer to
Ourdoor Board history to
diagnose more for related
error code
Reset the power supply
E41 VSD DC Link
Voltage Low
The drive has encountered an DC bus voltage
low.
Check the AC power supply.
Make correct supply
voltage.
Check if the compressor is
operating within specified
pressure limits.
Find the root cause for not
operating the compressor in
the specified limits or restart
the drive again.
