General Troubleshooting; Controls Troubleshooting - Greenheck DC Installation, Operation And Maintenance Manual

General Troubleshooting

Problem: Unknown, Initial Troubleshooting Steps.
1 Is supply power turned on at all circuit breakers and fan
disconnects?
2 Is there line voltage across L1 and L2/N on supply power
wiring?
3 Are line voltage measurements within +/- 10% of nominal
voltage across L1 and L2/N on supply power wiring?
4 Are resistance measurements between 500k Ohms and
Open across L1 and L2/N on power wiring? Are resistance
measurements Open across L1 and GND, and L2/N and
GND on power wiring?
5 Were fans and controls installed using only the provided
networking components (green shielded CAT-5e cables,
black shielded 3-way RJ45 splitters) or components that
comply with specifications on page 15?
6 Are 3-way RJ45 splitters installed with the single-port side
connected to black cable inside fan downtube?
7 Have all CAT-5e cable connections been unplugged and
reconnected to ensure that cables are fully seated (will
hear a "click" when fully seated)?
8 Are the Modbus addresses and biasing settings set as
shown on pages 16-18 for all fans?
9 Does communication wiring on VFD of fan 1 (directly
connected to control via shielded CAT-5e cable) match the
wiring diagram for fan 1 on page 16?
10 Does communication wiring on VFDs of all remaining fans
match the wiring diagram for all remaining fans on page
17?
11 Do fans operate as expected?
Everything is working properly.

Controls Troubleshooting

Problem: Standard Touchscreen control will not turn on.
1 Is the 24V wire (brown-white) connected on euro connector
of fan 1 (directly connected to control via shielded CAT-5e
cable)?
2 Is supply power turned on at all circuit breakers and fan
disconnects?
3 Were fans and controls installed using only the provided
networking components (green shielded CAT-5e cables,
black shielded 3-way RJ45 splitters) or components that
comply with specifications on page 15?
4 Are 3-way RJ45 splitters installed with the single-port side
connected to black cable inside fan downtube?
5 Have all CAT-5e cable connections been unplugged and
reconnected to ensure that cables are fully seated (will
hear a "click" when fully seated)?
6 Does the screen on the control light up?
Everything is working properly.
®
Yes No No supply power to fans. Turn circuit breakers and
disconnects to "on" position.
 
Yes No Supply power wiring not connected. Connect proper
power supply to fan. Refer to wiring diagram on page 14.
 
Yes No Phase imbalance or incorrect supply power applied to
fan. Correct supply power wiring to fan.
 
Electrical short in supply power wiring. Replace supply
Yes No
power wiring.
 
Networking components may be defective, incorrectly
Yes No
wired, or do not meet required specifications. Replace
 
with provided components or components that comply
with specifications on page 15.
Incorrect splitter orientation. Unplug splitter and
Yes No
reconnect in the proper orientation.
 
Yes No Loose or misaligned CAT-5e cable connection. Unplug
and reconnect all CAT-5e cable connections.
 
Incorrect Modbus and/or biasing settings on one or
Yes No
multiple VFDs. Adjust Modbus addresses and biasing
 
settings as shown on pages 16-18. All fans must have a
unique Modbus address setting.
Communication wiring on fan 1 is incorrect. Turn off
Yes No
supply power to fan and correct wiring as shown in wiring
 
diagram on page 16. Then turn supply power on.
Communication wiring on one or multiple fans is
Yes No
incorrect. Turn off supply power to fans and correct wiring
 
as shown in wiring diagram on page 17. Then turn supply
power on.
Check detailed troubleshooting steps on the following
Yes No
pages or contact the factory.
 
Yes No No supply power to control. Controls are powered by
VFD on fan 1 (directly connected to control via shielded
 
CAT-5e cable). Connect the 24V wire (brown-white) to the
euro connector of fan 1. Refer to instructions on page 16.
Yes No No supply power to fans. Turn circuit breakers and
disconnects to "on" position.
 
Yes No Networking components may be defective, incorrectly
wired, or do not meet required specifications. Replace
 
with provided components or components that comply
with specifications on page 15.
Yes No Incorrect splitter orientation. Unplug splitter and
reconnect in the proper orientation.
 
Yes No Loose or misaligned CAT-5e cable connection. Unplug
and reconnect all CAT-5e cable connections.
 
Yes No Contact factory.
 
Overhead Ceiling Fans 21