AAON RQ-006 - Manual (Page 59)

59
If there is no rotation and/or no speed
change, try the following:
1. Check the line-to-line voltage on the
fuse block connected to the supply fan
motor and ensure it is between 187VAC
to 264VAC
2. Turn the potentiometer to 50%
3. Energize the BC relay by making a
blower call.
4. Check DC voltage on S1 (-) and S2 (+),
0-10VDC signal on S1 & S2 sets the
speed of the motor – thus 0VDC is no
speed and 10VDC is full speed.
5. If DC Voltage is present on S1 & S2
then ensure that BC (blower relay) is
energized and is passing the DC voltage
through to the motor. If BC is not
energized then check wiring for 24VAC
blower call.
6. If no DC voltage is present on S1 & S2
then check S1 (-) & S3 (+), this is the
+10VDC output from the motor that is
supplied to the Potentiometer for speed
control.
If the following troubleshooting suggestions
do not solve the issue, contact AAON for
assistance.
Condenser Fan EC Motor Startup
The fan cycling option uses a fan cycle
switch to switch between one of the discrete
speed inputs (see Table 16) on the motor
thus cycling between two preset speeds
based upon discharge pressure of the unit.
By connecting 24VAC to a single or
combination of the yellow, white, or orange
wires, the motor will run at the discrete
speeds in Table 12.
WattMaster
Condenser Head Pressure
Module is used for variable speed control of
the motor to maintain a head pressure. The
motor should be factory wired to the PWM
outputs of the WattMaster Condenser Head
Pressure Module. See WattMaster literature
for
further information
(http://www.orioncontrols.com).
Note
High voltage wires out of the motor:
Black & Brown – 1 Phase Line Voltage
Green - Ground
Low control voltage wires out of the motor:
Blue – Common
Yellow
– Variable Speed Control
Table 16 - EC Condenser Fan Cycling Options
Color Terminal
Customer
Connection
Option 1 Option 2 Option 3 Option 4 Option 5
Black 0.50 BWS L1 208-230 VAC 208-230 VAC 208-230 VAC 208-230 VAC 208-230 VAC
Brown 0.50 BWS L2 208-230 VAC 208-230 VAC 208-230 VAC 208-230 VAC 208-230 VAC
Green
#10
EYELET Ground GND GND GND GND GND
Blue 0.50 BWS Common Common 24 VAC 24 VAC 24 VAC 24 VAC
Yellow 0.50 BWS Signal PWM 24 VAC 24 VAC
White 0.50 BWS Signal 24 VAC 24 VAC
Orange 0.50 BWS Signal 24 VAC 24 VAC
RPM 300-1100 300 500 850 1100
Rotation CCW CCW CCW CCW CCW
ECM Toolbox ID Variable Speed 4 Speed 3 Speed 2 Speed 1
20% PWM RPM 300
100% PWM RPM 1100