Overhead Ceiling Fans
50
®
Refer
ence
Tr
oubleshooting
Oper
ation And
Maintenance
Fan
Netw
orking
Electrical
Installation
Fir
e System
Integr
ation
Mechanical Installation
Pr
e-Installation
Gener
al
Information
Quick Start
Guide
Reference
Fault Code Causes and Possible Solutions
Code
Fault
Description
Possible Cause(s)
Solution
0
No Fault
Fan is operating as
expected
-
-
1
Modbus
Timeout
Inconsistent Modbus
RTU communication
between control and
drive resulting in
incorrect fan operation
1. Loose CAT-5e cable connections
2. Unshielded or damaged CAT-5e cables
and RJ45 splitters
3. Incorrect network biasing settings
4. Incorrect low voltage wiring on euro
connector
5. Incorrect supply power applied to VFD
6. Supply power phase imbalance
1. Verify that all CAT-5e cable connections
are fully seated and secure
2. Replace cables with the provided
networking components (green shielded
CAT-5e cables and black shielded 3-way
RJ45 splitters) or components that
comply with specifications on page 34
3. Refer to Fan Networking instructions on
pages 36-39
4. Refer to Fan Networking instructions on
pages 36-39
5. Verify that supply voltage is /-
10% of the VFD's rated voltage
6. Verify that current is consistent across all
phases of supply power
2
Impact
Detection
Unexpected change in
fan speed and/or motor
torque resulting in fan
shutdown
1. Fan blades and/or hub are obstructed
2. Motor power and/or hall cables not
connected to VFD, not fully seated, or
connected in incorrect orientation
3. Incorrect blade count and/or fan size
selected in control
4. Fan operating without blades installed
1. Remove any obstructions preventing fan
rotation
2. Unplug and reconnect motor power
and hall cables, refer to pages 30-32 for
proper orientation
3. Set fan size and blade count to match
physical product using instructions on in
appropriate control manual
4. Install blades on fan
3
Motor Over
Temperature
Internal motor
temperature exceeds
maximum value
resulting in reduced fan
speed or shutdown
Ambient temperature too high at the ceiling
Allow motor to cool before increasing speed
or restarting fan
4
Drive Over
Temperature
Internal VFD
temperature exceeds
maximum value
resulting in reduced fan
speed or shutdown
Ambient temperature too high at the ceiling
Allow VFD to cool before increasing speed
or restarting fan
5
Bus Over
Voltage
Internal VFD voltage is
higher than expected
resulting in fan
shutdown
Incorrect supply voltage
Verify that supply voltage is /- 10%
of the VFD's rated voltage
6
Bus Under
Voltage
Internal VFD voltage is
lower than expected
resulting in fan
shutdown
1. Incorrect supply voltage
2. Rapid power-cycling at circuit breaker
1. Verify that supply voltage is /-
10% of the drive's rated voltage
2. After turning power off, wait 30-60
seconds before turning power back on
7
Phase Over
Current
Current is higher than
expected on at least
one phase of supply
power resulting in fan
shutdown
1. Incorrect supply power
2. Supply power phase imbalance
1. Verify that supply power meets all power
quality requirements on page 33 and that
supply voltage is /- 10% of the
drive's rated voltage
2. Verify that current is consistent across all
phases of supply power
8
Microcontroller
High Temp
Microcontroller
temperature exceeds
maximum value
resulting in reduced fan
speed or shutdown
Ambient temperature too high at the ceiling
Allow VFD to cool before increasing speed
or restarting fan
9
Overspeed
Fault
Motor speed is
greater than maximum
allowable speed
resulting in reduced fan
speed or shutdown
1. Incorrect blade count and/or fan size
selected in control
2. Wind gusts in building
1. Set fan size and blade count to match
physical product using instructions in the
control manual
2. Close overhead doors, etc. or relocate fan