Danfoss VLT FC 102 Programming Manual page 290

Troubleshooting
ALARM 68, Safe Stop activated
Safe Torque Off (STO) has been activated. To resume
normal operation, apply 24 V DC to terminal 37, then send
a reset signal via bus, digital I/O, or by pressing [Reset].
If an alarm occurs during start-up, ensure that the 4-pole
fused disconnect is in the closed (horizontal) position.
Mains power must be present to remove the alarm.
ALARM 69, Power card temperature
4 4
The temperature sensor on the power card is either too
hot or too cold.
Troubleshooting
•
Check that the ambient operating temperature is
within limits.
•
Check for clogged filters.
•
Check fan operation.
•
Check the power card.
ALARM 70, Illegal FC configuration
The control card and power card are incompatible. To
check compatibility, contact the Danfoss supplier with the
type code from the unit nameplate and the part numbers
of the cards.
ALARM 71, PTC 1 safe stop
STO has been activated from the VLT
MCB 112 (motor too warm). Normal operation can be
resumed when the MCB 112 applies 24 V DC to terminal
37 again (when the motor temperature reaches an
acceptable level), and when the digital input from the MCB
112 is deactivated. When that happens, send a reset signal
(via bus or digital I/O, or press [Reset]).
ALARM 72, Dangerous failure
STO with trip lock. An unexpected combination of STO
commands has occurred:
•
®
VLT
X44/10, but STO is not enabled.
•
MCB 112 is the only device using STO (specified
through selection [4] PTC 1 alarm or [5] PTC 1
warning in parameter 5-19 Terminal 37 Safe Stop),
STO is activated, and X44/10 is not activated.
WARNING 73, Safe Stop auto restart
STO activated. With automatic restart enabled, the motor
can start when the fault is cleared.
WARNING 76, Power unit setup
The required number of power units do not match the
detected number of active power units.
This warning occurs when replacing a module for an F-size
enclosure if the power-specific data in the module power
card does not match the rest of the frequency converter.
Troubleshooting
•
Confirm that the spare part and its power card
are the correct part number.
288
®
PTC Thermistor Card
PTC Thermistor Card MCB 112 enables
Danfoss A/S © 10/2019 All rights reserved.
®
VLT HVAC Drive FC 102
ALARM 79, Illegal power section configuration
The scaling card has an incorrect part number or is not
installed. The MK102 connector on the power card could
not be installed.
ALARM 80, Drive initialised to default value
Parameter settings are initialized to default settings after a
manual reset. To clear the alarm, reset the unit.
ALARM 91, Analog input 54 wrong settings
Set switch S202 in position OFF (voltage input) when a
KTY sensor is connected to analog input terminal 54.
ALARM 92, No flow
A no-flow condition is detected in the system.
Parameter 22-23 No-Flow Function is set for alarm.
Troubleshooting
•
ALARM 93, Dry pump
A no-flow condition in the system with the frequency
converter operating at high speed can indicate a dry
pump. Parameter 22-26 Dry Pump Function is set for alarm.
Troubleshooting
•
ALARM 94, End of curve
The feedback is lower than the setpoint. This condition can
indicate leakage in the system. Parameter 22-50 End of
Curve Function is set for alarm.
Troubleshooting
•
ALARM 95, Broken belt
Torque is below the torque level set for no load, indicating
a broken belt. Parameter 22-60 Broken Belt Function is set
for alarm.
Troubleshooting
•
ALARM 96, Start delayed
Motor start has been delayed due to short-cycle
protection. Parameter 22-76 Interval between Starts is
enabled.
Troubleshooting
•
WARNING 97, Stop delayed
Stopping the motor has been delayed because the motor
has been running for less than the minimum time specified
in parameter 22-77 Minimum Run Time.
WARNING 98, Clock fault
Time is not set, or the RTC clock has failed. Reset the clock
in parameter 0-70 Date and Time.
Troubleshoot the system and reset the frequency
converter after clearing the fault.
Troubleshoot the system and reset the frequency
converter after clearing the fault.
Troubleshoot the system and reset the frequency
converter after clearing the fault.
Troubleshoot the system and reset the frequency
converter after clearing the fault.
Troubleshoot the system and reset the frequency
converter after clearing the fault.
M0010001