ALARM 67, Option module configuration has changed
One or more options have either been added or removed
since the last power-down. Check that the configuration
change is intentional and reset the unit.
ALARM 68, Safe stop activated
Loss of the 24V DC signal on terminal 37 has caused the
filter to trip. To resume normal operation, apply 24V DC to
terminal 37 and reset the filter.
ALARM 69, Power card temperature
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 Adjustable frequency drive configuration
The control card and power card are incompatible. Contact
your supplier with the type code of the unit from the
nameplate and the part numbers of the cards to check
compatibility.
ALARM 71, PTC 1 safe stop
Safe Stop has been activated from the MCB 112 PTC
Thermistor Card (motor too warm). Normal operation can
be resumed when the MCB 112 applies 24 V DC to T-37
again (when the motor temperature reaches an acceptable
level) and when the digital Input from the MCB 112 is
deactivated. When that happens, a reset signal must be is
be sent (via Bus, Digital I/O, or by pressing [RESET]).
ALARM 72, Dangerous failure
Safe Stop with Trip Lock. The dangerous failure alarm is
issued if the combination of safe stop commands is
unexpected. This is the case if the MCB 112 VLT enables
X44/10 but safe stop is somehow not enabled.
Furthermore, if the MCB 112 is the only device using safe
stop (specified through selection [4] or [5] in
5-19 Terminal
37 Safe Stop
), an unexpected combination is activation of
safe stop without the X44/10 being activated. The
following table summarizes the unexpected combinations
that lead to Alarm 72. Note that if X44/10 is activated in
selection 2 or 3, this signal is ignored! However, the MCB
112 will still be able to activate Safe Stop.
ALARM 80, Drive initialized to default value
Parameter settings are initialized to default settings after a
manual reset. Reset the unit to clear the alarm.
ALARM 92, No-flow
A no-flow condition has been detected in the system.
22-23 No-Flow Function
is set for alarm. Troubleshoot the
system and reset the Adjustable frequency drive after the
fault has been cleared.
ALARM 93, Dry pump
A no-flow condition in the system with the Adjustable
frequency drive operating at high speed may indicate a
dry pump.
22-26 Dry Pump Function
is set for alarm.
Troubleshoot the system and reset the Adjustable
frequency drive after the fault has been cleared.
ALARM 94, End of curve
Feedback is lower than the setpoint. This may indicate
leakage in the system.
22-50 End of Curve Function
is set for
alarm. Troubleshoot the system and reset the Adjustable
frequency drive after the fault has been cleared.
ALARM 95, Broken belt
Torque is below the torque level set for no load, indicating
a broken belt.
22-60 Broken Belt Function
is set for alarm.
Troubleshoot the system and reset the Adjustable
frequency drive after the fault has been cleared.
ALARM 96, Start delayed
Motor start has been delayed due to short-cycle
protection.
22-76 Interval between Starts
is enabled.
Troubleshoot the system and reset the Adjustable
frequency drive after the fault has been cleared.
WARNING 97, Stop delayed
Stopping the motor has been delayed due to short cycle
protection.
22-76 Interval between Starts
is enabled.
Troubleshoot the system and reset the Adjustable
frequency drive after the fault has been cleared.
WARNING 98, Clock fault
Time is not set or the RTC clock has failed. Reset the clock
in
0-70 Date and Time
.
WARNING 200, Fire mode
This indicates the Adjustable frequency drive is operating
in fire mode. The warning clears when fire mode is
removed. See the fire mode data in the alarm log.
WARNING 201, Fire Mode was Active
This indicates the Adjustable frequency drive had entered
fire mode. Cycle power to the unit to remove the warning.
See the fire mode data in the alarm log.
WARNING 202, Fire mode limits exceeded
While operating in fire mode one or more alarm conditions
have been ignored which would normally trip the unit.
Operating in this condition voids unit warranty. Cycle
power to the unit to remove the warning. See the fire
mode data in the alarm log.
WARNING 203, Missing motor
With a Adjustable frequency drive operating multi-motors,
an underload condition was detected. This could indicate a
missing motor. Inspect the system for proper operation.
WARNING 204, Locked rotor
With a Adjustable frequency drive operating multi-motors,
an overload condition was detected. This could indicate a
locked rotor. Inspect the motor for proper operation.
General Specifications and ...
VLT
®
HVAC Drive Design Guide
MG11BB22 - VLT
®
is a registered Danfoss trademark
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