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F A N S C / P 1 . 2
performing the maintenance work (for example lockable
isolators).
•
Observe the regulations of the motor manufacturer and also the
inverter manufacturer (where applicable).
DANGER
There is electrical voltage in the intermediate circuit of the
electronics and at the main connection when the permanent magnet
motor is rotating.
•
Do not perform any work on the fan when the impeller/motor is
rotating freely.
•
Lock the impeller using suitable means.
•
Before performing maintenance work, use suitable means to
remove all harmful or hazardous residual materials that have
found their way into the fan as a result of the conveying media.
Recommissioning is then performed once the safety inspections stated
in Chapter 6 "Commissioning / safety inspections" have been
completed. However, work that can only be performed during operation
in compliance with the applicable safety and accident prevention
regulations is excluded from this. This for example includes
measurement of vibrations and shock pulses.
WARNING
Failure to observe these points can present hazards to the life or
physical condition of the maintenance personnel.
NOTICE
If the condition of the fan does not allow repair by appropriate
means, the fan must be shut down immediately and, if necessary,
replaced.
7.2. Maintenance intervals
During extended periods of non-use, the fan should be started up
regularly for a short period as a way of avoiding bearing damage due to
mechanical stress or ingress of moisture. After being stored for an
extended period of time, the motor bearings should both be checked
before installation.
NOTICE
The maintenance regulations of the motor manufacturer, as well as
information from the manufacturers of the switch and devices and
the frequency converter must be observed.
To maintain correct operation and ensure safety, we recommend having
the function and condition of fans checked at regular intervals by
qualified personnel or a specialist company and having the results
documented. The type, scope and maintenance intervals, as well as any
further actions that are necessary, should all be specified on the basis
of how the fans are used, as well as the conditions in place on site. For
the maintenance and inspection recommendations based on VDMA
24186--1, please refer to our our website: www.nicotra-gebhardt.com.
NOTICE
Do not use any high-pressure cleaners (steam cleaners). Do not use
cleaning agents that contain strong acids or alkalis!
7.2.1. Vibrations
The fan should be checked regularly for mechanical vibrations. The
maximum vibration velocity in the radial direction on the level of the
motor is 4.5 mm/s. In the case of impellers with nominal diameters of
up to 315 mm, up to 7 .1 mm/s is permitted when fitted. If the permitted
vibration values are exceeded, it is mandatory to rebalance the entire
rotating unit in accordance with DIN ISO 21940-11.
7.2.2. Impeller mounting
Following impeller mounting and remounting, the fan must be checked
for mechanical vibrations. It may also need to be rebalanced.
7.3. Spare parts
Only use original spare parts as specified in the spare parts list.
NOTE
We do not accept any liability for damage caused by the use of non-
original parts.
8. Breakdowns/malfunctions
Deviations from the standard operating conditions of the fan indicate
malfunctions and should be investigated promptly by the maintenance
personnel.
CAUTION
Malfunctions that persist for an extended period of time can lead to
destruction of the fan and also system components, as well as personal
injuries.
If the maintenance personnel is unable to rectify the issue, please
request a visit from our mobile customer service.
9. Troublshooting Guide
9.1. Fault Indication – LED Blink Codes
When a fault is indicated, the LED will blink the number of times
specified in the chart below followed by a 2 second pause before it
blinks again.
Fault
Modbus
fault code
No Fault
0
Motor soft-
1
ware fault
Under Voltage
2
Over Voltage
4
Over Tempera-
8
ture
Speed Feed-
16
back
Start Up
32
Loss of input
64
phase
Reserved
128
Hardware Fault
256
UL Safety fault
512
Internal Com-
1024
munication
Loss
Software Error
2048
© 2023 Regal Rexnord Corporation. All Rights Reserved.
LED
Description
Code
0
No Fault
1
Sensorless loop in soft-
ware lasted too long
2
DC bus voltage falls be-
low the threshold voltage
3
DC bus voltage exceeds
the threshold voltage
4
IPM temperature is
above threshold.
5
Measured speed does
not match reference
speed
6
Open to close loop tran-
sition failed
7
Disconnection of motor
phases
8
tbd
9
Hardware over voltage or
short circuit fault
10
One of the UL safety
core faults
11
Internal communication
between micro control-
lers lost
12
Motor firmware error
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E N
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