Sullair 02250165-411 R01, User Manual

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WS CONTROLLER USER INTERFACE MANUAL SECTION 6
42
6.5 STARTUP OF NEW VSD
COMPRESSOR PACKAGE
Read and follow all safety warnings and cautions in
this manual.
1. At installation ensure:
• That the incoming power and ground wires
are properly connected to terminal blocks
in the electrical control box.
• Visually check all power and controls con-
nections to the drive to ensure that no dam-
age has occurred.
2. Check that moisture has not condensed
inside the variable speed drive.
3. Connect to the utility and switch the power
on. The WS Controller will establish commu-
nications and report errors if correct condi-
tions are not found. If replacing a drive,
communication faults will be indicated for
either improper communication wiring or
improper application or communication soft-
ware in the drive.
4. Check the direction of the fan rotation. To
observe the rotation, quickly press START
then the STOP on the WS
Controller. If the fan rotates incorrectly, dis-
connect power and interchange two of the
fan motor leads at the fan starter. Compres-
sor motor rotation is factory set.
6.6 VSD COMPRESSOR
TROUBLESHOOTING
The WS Controller continuously monitors VSD drive
performance through the serial channel. Table 6-3
shows Fault messages that are displayed by the WS
Controller in the event of problems along with
possible causes and some likely solutions. The
controller monitors communications with the inverter
and will display a fault message if these
communications are broken. The WS Controller will
display a VSD drive fault with a code number of the
form V—accompanied by a text description. If a
keypad service tool is plugged into the drive, it will
display the fault code and the fault name.
Table 6-3: VSD Troubleshooting Guide—Drive Faults
CODE FAULT POSSIBLE CAUSE SOLUTION
VSD1 Com Fault Communications lost with the VSD Check connections to the VSD.
Check VSD control power and check for
board faults.
VSD1 Parameter Error An error has occurred during setup of
the VSD adjustments. Check for proper drive size.
Check proper WS model commissioning.
V01 Overcurrent The variable speed drive has detected
a high current (>4xIn) in its output due
to:
• sudden heavy load increase
• short in the motor
• short in the cables to the motor
• unsuitable motor Check loading.
Check motor.
Check cables.
V02 Overvoltage The DC-link voltage has exceeded its
high limit due to:
• deceleration time too short
• high voltage levels or surges in the
utility supply
Make the deceleration time longer.
Use a chopper and brake resistor.
Correct utility supply voltage (level is too
high).
Add input impedance to limit surges.
V03 Ground Fault (Earth
Fault) Current sensing indicates that the
sum of motor phase currents is not
zero.
• insulation failure in motor or motor
cables
Remove faults from ungrounded
systems.
Check the motor and motor cables.