1330 TROUBLESHOOTING GUIDE

1330 TROUBLESHOOTING GUIDE
SYMPTOM
STEP
DIAGNOSTIC PROCEDURE
A. Unit does not turn
on when the START
push button switch is
pressed.
1
Measure input line voltage between
TB1-1 and TB1-2. Line voltage
should be between 189 and 253V AC.
2
Measure input line voltage between
TB1-1 to K1-L1, TB1-2 to K1-L2 and
TB1-3 to K1-L3.(TB1-3 to K1-L3
measurement not required for single
phase option.) Voltage should be
zero.
If 1 or more fuses are blown check
the following before reapplying AC
power:
3
a) Set ohmmeter on X1 scale. Check
rectifier bridge CR1 as follows:
Ohmmeter
(+)
REPAIR
PROCEDURE
Check and repair
external line voltage
source.
1 or more fuses
(F1-F3) blown.
Replace blown fuse or
fuses. Perform Step
A3 before reapplying
power.
a) A low ohmmeter
reading.
a) Replace CR1.
b) A sustained low
reading indicates C2
is shorted.
b) Replace shorted
capacitor.
Reading
(-)
CR1(+) CR1-A
CR1(+) CR1 -B
CR1(+) CR1 -C
CR1-A CR1(-)
CR1-B CR1(-)
CR1-C CR1(-)
infinite
infinite
infinite
infinite
infinite
infinite
b) Remove leads from one side of
capacitor C2.
CONT.
PROBABLE
FAILURE OR
INDICATION
External line source
voltage not present.
Connect positive (+) ohmmeter lead
to capacitor positive (+). Connect
negative (-) ohmmeter lead to
capacitor negative (-). Set ohmmeter
on X1 scale. The meter should
immediately read low, then the meter
indicator should slowly swing to a
high (infinite) reading.
NOTE:
Check F6 and F7
fuses on the control
assembly 50282.
1330 TROUBLESHOOTING GUIDE
SYMPTOM
STEP
4
DIAGNOSTIC PROCEDURE
Check for open fuses on the control
assembly 50282.
Check F4
Check F5
Check F6
Check F7
5
Measure AC voltage across connector
J8-5 to J8-6 on the control assembly
50282.
6
Swing back hinged panel assembly.
Confirm that DS1 on the control
assembly 50282 is lit
PROBABLE
FAILURE OR
INDICATION
F4 blown--T1 faulty -faulty relay (1CR, 4CR,
5CR).
1
2
Replace blown fuse
and faulty component.
F5 blown--K1 shorted.
F6 and/or F7--Refer to
Step A3.
If voltage is present,
relay 1 CR may be
faulty. If voltage is zero
refer to previous Steps
A2, A3, and A4.
a) If DS1 is lit, but fuses
F6 and/or F7 are not
blown, relay 2CR may
be faulty.
b) If DS1 is not lit and
all fuses are good, logic
assembly 50281 may be
faulty.
B. Contactor K
energizes
momentarily then
unit trips off.
REPAIR
PROCEDURE
After the unit trips off, but before
pressing the STOP push button, look
at lights DS2, 3, and 5 on Logic
Assembly 50281.
Replace blown fuse,
or faulty relay
a) Replace 2CR relay.
b) Replace logic
assembly 50281 .
Correct the high input
line condition
If DS2 is lit, check line voltage as in
Step A1.
If DS3 is lit, set the speed pot to zero,
press STOP, wait a moment, then
press START push button. Proceed as
follows:
DS2 lit: High bus
voltage
a) Observe that DS3 is lit.
a) Defective Logic
Assembly.
a) Replace 50281
Logic Assembly.
b) Observe that DS3 is not lit.
b) The original cause for
DS3 to be lit is probably
external to the inverter
and possibly due to
overload, defective
motor or wiring.
b) Perform diagnostic
procedure 2.C.
c) Disconnect the motor from the
inverter (drive). Confirm that DS3
does not light when the speed pot is
turned up to 50% speed.
c) Overload or defective
motor or defective
wiring.
c) Repair/replace
motor or remove
overload.
1330 TROUBLESHOOTING GUIDE
1330 TROUBLESHOOTING GUIDE
SYMPTOM
STEP
DIAGNOSTIC PROCEDURE
3
If DS5 is lit, remove AC input
power. Swing back the hinged
panel assembly Using Power
Switch Assembly Tester, P/N
300003, check each driver
module as outlined in the Tester
Manual.
C. The unit trips off
during normal
operation.
PROBABLE
FAILURE OR
INDICATION
Shorted power transistor
module(s) .
REPAIR PROCEDURE
Replace faulty driver
module(s) and return to
factory for repair.
If a tester P/N 300003 is
not available, replace all
three driver modules and
return them to factory.
After the unit trips off, but
before pressing the STOP push
button, look at lights DS1, 2 and
4 on logic assembly.
1
If DS1 is lit, check input line
voltage as in Step A1
2
If DS2 is lit, proceed as follows:
3
DS1 lit: Low line voltage
or previous low line
voltage transients.
Check and correct line
voltage condition .
a) Measure the input line
voltage. Line voltage should not
be greater than 253V AC.
a) Line voltage is
marginally high.
a) Check and correct line
voltage condition.
b) Restart the unit by pressing
STOP, then START push button.
Rotate the speed pot until the
desired motor speed is achieved.
Now rapidly rotate the speed
CCW to zero.
b) If the unit trips off,
the decel. rate is set too
high for the motor/load
inertia.
b) Do one or both of the
following:
1 ) Decrease the
deceleration rate.
2) Install a heavy duty
dynamic brake.
If DS4 lights momentarily when
the unit trips off, proceed as
follows:
a) Examine STOP button and the
associated wiring.
a) Loose connection in
STOP switch circuit.
a) Repair loose
connection.
b) Monitor line voltage.
b) Negative line voltage
transient.
b) Correct line voltage
condition .
1330 TROUBLESHOOTING GUIDE
SYMPTOM
STEP
DIAGNOSTIC
PROCEDURE
Measure the line-line voltage
across each motor lead. The
voltage should be
approximately 230V AC per
phase with speed pot fully CW.
Visually check switch S4 and
S5 settings (See Table 1,
following). S4 and S5 are
located on Logic Assembly
50281 .
Visually check the setting of
switch S1. (DC Boost) on the
Logic Assembly 50281 .
PROBABLE FAILURE
OR INDICATION
Open motor leads or
faulty motor
REPAIR
PROCEDURE
If voltage is zero
replace the logic
assembly.
Volts/Hz set too low.
Set switches to proper
setting for desired
Volts/Hz.
Motor breakaway torque
is too high for the
amount of set DC boost.
Set switch S1 to a
higher number setting
until the motor turns at
low speed pot
positions.
Slowly turn R19 until
motor reaches full
speed at full load
during accel.
Replace standard duty
dynamic brake with
heavy duty dynamic
brake.
D Unit turns on but
the motor will not
turn.
1
E. The motor slows
down or stops when
loaded .
1
F. The motor will not
turn until the speed
pot is near full CW.
1
G. The motor will not
reach full speed when
fully loaded.
1
Slowly turn R19 (accel. Limit)
on Logic Assembly 50281
clockwise.
Accel. current limit set
too low.
H. Unit will not restart
after cycling.
1
Allow unit to cool for 5
minutes; press STOP, then
START push buttons. Unit
should restart.
Cycle rate too rapid for
standard duty dynamic
brake.
1330 TROUBLESHOOTING GUIDE
TABLE 1 - SWITCH POSITION STATUS
SWITCH S4 - 6 POSITION
Volts/Hz
4.42
4.08
3.97
3.83
3.74
3.63
3.40
3.18
2.95
2.72
2.61
2.50
2.38
2.27
2.16
2.04
1.93
1.82
1.70
1.59
1.47
1.36
1.25
1.13
1.02
0.91
0.79
0.45
S4-1
X
O
X
O
X
O
O
O
O
O
X
O
X
O
X
O
X
O
X
O
X
O
X
O
X
O
X
O
S4-2
X
O
X
X
O
O
X
O
X
O
X
X
O
O
X
X
O
O
X
X
O
O
X
X
O
O
X
O
S4-3
X
X
O
O
O
O
X
X
O
O
X
X
X
X
O
O
O
O
X
X
X
X
O
O
O
O
X
X
S4-5
O
O
O
O
O
O
X
X
X
X
O
O
O
O
O
O
O
O
X
X
X
X
X
X
X
X
O
O
S4-5
O
O
O
O
O
O
X
X
X
X
X
X
X
X
X
X
X
X
O
O
O
O
O
O
O
O
O
O
S4-6
X
X
X
X
X
X
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
S5-1
O
O
X
X
O
X
X
O
O
X
O
X
O
O
X
O
X
O
O
X
O
X
X
O
X
O
X
X
SWITCH S5 - 4 OR 6 POSTION
SEE NOTE ❶
S5-2
S5-3
S5-4
S5-5
X
X
X
X
O
X
X
X
X
O
X
X
X
O
X
X
X
O
X
X
O
O
X
X
X
X
O
X
X
X
O
X
O
X
O
X
X
O
O
X
X
O
O
X
O
O
O
X
O
O
O
X
O
O
O
X
X
X
X
O
X
X
X
O
O
X
X
O
O
X
X
O
O
X
X
O
X
O
X
O
X
O
X
O
O
O
X
O
O
O
X
O
O
O
X
O
X
X
O
O
X
X
O
O
O
X
O
O
X
O
O
O
S5-6
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O