SI0487 (1121)
3
JOHNSON CONTROLS
6. Check the tables below for the potential fault code of the motor based on the LED:
Number of
pulses
Fault Code (Red LED color)
Comments
1
Phase failure
Automatic restart once phase failure is corrected
3
Power module overheated
Power cycle required
4
Internal communications error be-
tween primary/secondary controller
Primary = electronics, Secondary = motor. Power cycle required.
6
Motor overheated
Power cycle required
7
Hall sensor error
Power cycle required
8
Motor blocked
Automatic restart after blockage is cleared
9
Speed limit exceeded
Automatic restart
11
Rotor position sensor calibration error Power cycle required
13
DC-link undervoltage
Automatic restart after undervoltage is cleared
Number of
pulses
Fault Code (Yellow LED color)
Comments
1
Current limitation in action
Current limited to prevent damage of the electronics
2
Line impedance too high
DC link voltage is instable
3
Power limiter in action
Derating is active
4
Output stage temperature high
Temperature > 105°C
5
Motor temperature high
Temperature > 130°C
6
Temperature inside electronics high
Temperature > 105°C
7
DC-link voltage low
DC-link < 460V
8
Braking mode
Error after 20s when motor start was not possible
9
Calibration of rotor position
Calibration of rotor position sensor in progress
10
Actual speed is lower than run moni-
toring speed limit
Only if set value > 0
11
Cable break at analog or PWM input
for analog set value
Check wiring
NOTE:
This fault code may be present if the command signal to the
motor is 0%. Increase command signal to check if wiring issue.
13
DC-link voltage high
DC-link > 850V
15
Line-voltage high
U1_peak > 850VDC
16
Shedding function active
Shedding function is active and fan is blocked
7. If any of the above fault codes cannot be cleared, replace fan assembly.
8. Deenergize unit and perform lockout/tagout procedures. Verify all power has been removed from unit.
9. Check input fuses to fan motors. Replace fuses if needed.
10. Disconnect wiring from fan motor. Wring out wires to verify no wiring shorts. Replace wiring as needed.
11.
Use a standard multimeter to check resistance on motor input terminals L1, L2, L3 between each phase (L1 to
L2, L2 to L3, L3 to L1). Resistance should be greater than 2 ohms.
a.
If resistance is less than 2 ohms during any check of motor terminals, replace fan assembly.
b.
If resistance is greater than 2 ohms and no wiring shorts are present, secure motor terminal box, remove
lockout/tagout and apply power to motor.
i. Check if LED is red or yellow, or blinking. See tables in Step 6 for fault codes.
ii. If no faults are shown, verify motor is operational.
iii. If LED is not lit and/or fuses continue to fail, or fan is not operational, replace fan assembly.
