Honeywell 3G SmartVFD HVFD3D3A0015 Installation And User Manual page 71

Troubleshooting
ALARM 18, Start failed
The speed has not been able to exceed 1-77 Compressor Start Max Speed [RPM]
during start within the allowed time (set in 1-79 Compressor Start Max Time to
Trip). This may be caused by a blocked motor.
WARNING 23, Internal fan fault
The fan warning function is an extra protective function that checks if the fan is
running/mounted. The fan warning can be disabled in 14-53 Fan Monitor ([0] Dis-
abled).
For the D frame filters, the regulated voltage to the fans is monitored.
Troubleshooting
WARNING 24, External fan fault
The fan warning function is an extra protective function that checks if the fan is
running/mounted. The fan warning can be disabled in 14-53 Fan Monitor ([0] Dis-
abled).
Troubleshooting
WARNING 25, Brake resistor short-circuit
The brake resistor is monitored during operation. If a short circuit occurs, the brake
function is disabled and the warning appears. The adjustable frequency drive is
still operational but without the brake function.
Troubleshooting
66
• Check connections on the serial communication cable.
• Increase 8-03 Control Word Timeout Time.
• Check the operation of the communication equipment.
• Verify a proper installation based on EMC requirements.
• Check for proper fan operation.
• Cycle power to the adjustable frequency drive and check that the fan
operates briefly at startup.
• Check the sensors on the heatsink and control card.
• Check for proper fan operation.
• Cycle power to the adjustable frequency drive and check that the fan
operates briefly at startup.
• Check the sensors on the heatsink and control card.
• Remove power to the adjustable frequency drive and replace the brake
resistor (see 2-15 Brake Check).
31-00559-01