Grundfos CUE Series Service Instructions

English (GB)
11
24 External fan fault
The fan warning function is an extra protection
function that checks if the fan is running/mounted.
The fan warning can be disabled in parameter 14-53
Fan Monitor ([0] Disabled).
For the D, E, and F Frame drives, the regulated
voltage to the fans is monitored.
Check fan resistance.
Check soft charge fuses.
W
25
Brake resistor
short circuit
Contact Grundfos Service. W
26
Brake resistor
power limit
Contact Grundfos Service. W/A
27
Brake chopper
fault
Contact Grundfos Service. W/A
28
Brake check
failed
Contact Grundfos Service. W/A
29 Heat sink temp
The maximum temperature of the heat sink has
been exceeded. The temperature fault will not be
reset until the temperature falls below a defined
heat sink temperature. The trip and reset points are
different based on the drive power size.
• The ambient temperature too high.
• Too long motor cable.
• Incorrect clearance above and below the
drive.
• Dirty heat sink.
• Blocked air flow around the drive.
• Damaged heat sink fan.
• For the D, E, and F Frame Drives, this
alarm is based on the temperature
measured by the heat sink sensor
mounted inside the IGBT modules. For
the F Frame drives, this alarm can also be
caused by the thermal sensor in the
Rectifier module.
• Troubleshooting:
• Check fan resistance.
• Check soft charge fuses.
• Check IGBT thermal sensor.
W/A
30
Motor phase U
missing
Motor phase U between the adjustable frequency
drive and the motor is missing.
Turn off the adjustable frequency drive and
check motor phase U.
A
31
Motor phase V
missing
Motor phase V between the adjustable frequency
drive and the motor is missing.
Turn off the adjustable frequency drive and
check motor phase V.
A
32
Motor phase W
missing
Motor phase W between the adjustable frequency
drive and the motor is missing.
Turn off the adjustable frequency drive and
check motor phase W.
A
33 Inrush fault
Too many power-ups have occurred within a short
time period.
Let unit cool to operating temperature. A
34
Fieldbus
communication
fault
The serial communication bus on the
communication option card is not working.
Contact Grundfos Service. W/A
35 Option fault
An option alarm is received. The alarm is option-
specific.
• Wait for 30 seconds until the drive is
completely powered on.
• Check the communication.
W/A
36 Mains failure
This warning/alarm is only active if the supply
voltage to the adjustable frequency drive is lost and
parameter "14-10 Mains Failure" is not set to OFF.
Check the fuses to the adjustable frequency
drive.
W/A
38 Internal fault
• Cycle the power.
• Check that the option is properly installed.
• Check for loose or missing wiring.
• Contact Grundfos Service.
A
39 Heat sink sensor
No feedback from the heat sink temperature sensor.
The signal from the IGBT thermal sensor is not
available on the power card.
• Check the ribbon cable between the
power card and the gate drive card.
• Check for a defective power card.
• Check for a defective gate drive card.
A
40
Overload of
Digital Output
Terminal 27
Terminal 27 is overloaded.
Check the load connected to terminal 27, or
remove short-circuit connection.
Check parameter "5-00 Digital I/O Mode"
and parameter "5-01 Terminal 27 Mode".
W
41
Overload of
Digital Output
Terminal 29
Terminal 29 is overloaded.
Check the load connected to terminal 29, or
remove short-circuit connection.
Check parameter "5-00 Digital I/O Mode"
and parameter "5-02 Terminal 29 Mode".
W
Alarm
code
Description Cause Remedy Type

Grundfos CUE Series Specifications

General

Category	DC Drives
Output Voltage	24 V DC
Control Signal	0-10 V, 4-20 mA
Communication	Modbus RTU
Protection Features	Overvoltage, overcurrent, overtemperature, short circuit
Humidity	5% to 95% (non-condensing)
Enclosure class	IP20
Enclosure Rating	IP20