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6
T
ROUBLESHOOTING
Item
Fault/Protection
1
Compressor Phase
Over Current
2
Torque Limit Fold
Back Timeout
AC Input Over
3
Current
4
DC Bus Over
Voltage
5
DC Bus Under
Voltage
6
AC Input Over
Voltage
7
AC Input Under
Voltage
8
AC Voltage
Imbalance
9
Power Module Over
Temp
10
IGBT Over Temp
11
Lost Rotor Position
12
Compressor Phase
Current Imbalance
Microelectronic Fault
13
G
UIDE
Check and Handling
1.
Check the U/V/W connections on drive side
2.
Check the compressor motor windings
3.
Check the compressor is operating with in
specified limits
Compressor Torque ≥ foldback protection
1.
value (for 30 seconds).
2.
Check if the compressor is operating outside
the specified speed range.
1.
Check the line voltage is too low.
2.
Check the line voltage for noise.
3.
Check the compressor is operating with in
specified limits.
4.
If the problem still persists, then it's possibly
a drive component issue. Replace the drive
1.
Check the DC bus voltage if it is > 850VDC
2.
Check AC Power Supply
3.
Check the compressor is operating with in
specified limits.
4.
Restart the drive
1.
Check the DC bus voltage if it is < 350VDC
2.
Check the compressor is operating with in
specified limits.
3.
Restart the drive
Check the line voltage if it is > 645VAC
1. Check the line voltage if it is < 500VAC
2. Check the compressor is operating with in
specified limits.
Check if all input cables are connected or any line is
missing. Checking if the voltage is below 500VAC. If
the problem persists, replace the drive
Verify proper airflow over the heat-sink of the drive.
Remove any obstructions. Check that the compressor
is operating within specified limits. Check the
mounting screws on the drive, make sure they are
tight. If the problem, still persists replace the drive.
Verify proper airflow over the heat-sink of the drive.
Remove any obstructions. Check that the compressor
is operating within specified limits. Check the
mounting screws on the drive, make sure they are
tight. If the problem, still persists replace the drive.
1. Check the U/V/W connections on drive side &
compressor side.
2. Check the compressor motor windings
3. Check system charge levels, if too high this
problem can occur.
Rolling LED
Registers
Bit
78
80
0
INVERTER
OVER
CURRENT
79
81
2
ENVELOPE
FOLDNACK
TIMEOUT
78
80
1
AC OVER
CURRENT
78
80
2
DC OVER
VOLTAGE
78
80
3
DC UNDER
VOLTAGE
78
80
4
AC OVER
VOLTAGE
78
80
5
AC UNDER
VOLTAGE
78
80
6
IMBALANCE
78
80
11
INVERTER
OVER TEMP
78
80
12
IGBT OVER
78
80
13
LOST ROTOR
82
84
0
INVERTER
CURRENT
IMBALANCE
82
84
2
Code
AC
TEMP
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