English (GB)
13
64 Voltage limit
The load and speed combination demands a motor
voltage higher than the actual DC link voltage.
Contact Grundfos Service. W
65
Control Card
Overtemperature
Control card overtemperature: The cut-out
temperature of the control card is 80 °C (176 °F).
• Check that the ambient operating
temperature is within the limits.
• Check for clogged filters.
• Check the fan operation.
• Check the control card.
W/A
66
Heat sink
temperature low
This warning is based on the temperature sensor in
the IGBT module.
• The heat sink temperature measured as 0
°C (32 °F) could indicate that the
temperature sensor is defective, causing
the fan speed to increase to the
maximum. If the sensor wire between the
IGBT and the gate drive card is
disconnected, this warning results.
• Check the IGBT thermal sensor.
W
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.
A
68
Safe stop
activated
Safe stop 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
the reset key). See parameter 5-19, Terminal 37
Safe Stop.
Check the contacts and switches between
terminals 12/13 and 37.
A
69
Power card
temperature
The temperature sensor on the power card is either
too hot or too cold.
• Check that the ambient operating
temperature is within limits.
• Check for clogged filters.
• Check the fan operation.
• Check the power card.
A
70
Illegal FC
Configuration
The actual combination of control board and power
board is illegal.
Contact Grundfos Service. A
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 the
digital input from the MCB 112 is deactivated.
When that happens, a reset signal must be sent (via
serial communication, digital I/O, or by pressing the
reset button on keypad). Note that if automatic
restart is enabled, the motor may start when the
fault is cleared.
Contact Grundfos Service. W/A
72
Dangerous
failure
Safe stop with trip lock. Unexpected signal levels on
safe stop and input from the MCB 112 PTC
thermistor card.
Contact Grundfos Service. A
73
Safe stop auto
restart
The motor is safe-stopped. Note that with automatic
restart enabled, the motor may start when the fault
is cleared.
Check the contacts and switches between
terminals 12/13 and 37.
W
76 Power unit setup
The required number of power units does not match
the detected number of active power units. If the
power card connection is lost, the unit also triggers
this warning.
• Confirm that the spare part and its power
card are the correct part number.
• Ensure that the 44-pin cables between
the MDCIC and power cards are mounted
properly.
W
77
Reduced power
mode
This warning indicates that the drive is operating in
reduced power mode (meaning less than the
allowed number of inverter sections). This warning
is generated on power cycle when the drive is set to
run with fewer inverters and will remain on.
Contact Grundfos Service. W
79
Illegal power
section
configuration
The scaling card is the incorrect part number or not
installed. Also MK102 connector on the power card
could not be installed.
Contact Grundfos Service. A
80
Drive initialized
to default value
Parameter settings are initialised to default settings
after a manual reset.
Contact Grundfos Service. A
81 CSIV corrupt CSIV file has syntax errors. Contact Grundfos Service. A
82
CSIV parameter
error
CSIV failed to initialize a parameter. Contact Grundfos Service. A
91
Analog input 54
wrong settings
Switch S202 has to be set in position OFF (voltage
input) when a KTY sensor is connected to analog
input terminal 54.
Check the dip switch in the drive. A
Alarm
code
Description Cause Remedy Type
To Next Page
Loading...
Need help?
General
