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V
DC
Field Accessories:
Economizer
1 Stage E Heat
2 Stage E Heat
NOTE: Values in the Field Accessories section are VDC adders.
Fig. 8 — Example of Fan Speed Set Up Labels for Electro-Mechanical Controls
TROUBLESHOOTING THE ECM MOTOR
Axion™ Fan motors are designed with several built-in protec-
tions included in the motor software. If the motor detects a fault
it will safely shut down. For temperature related faults the motor
requires a line voltage reset to continue operation. For all others,
the motor will resume operation automatically as soon as the
fault condition is cleared. See Table 2 for a complete list.
Table 2 — Fault Condition/Reset Trigger
Fault
Reset
Condition
Trigger
Phase Failure
Automatic
Locked/ Blocked
Automatic
Rotor
Motor Over
Manual
Heated
Power Module
Manual
Over Heated
Line under-
Automatic
voltage
Communication
Automatic
Error
ESP in. wg
0.2
0.4
0.6
0.8
5.4
6.2
6.9
7.5
1500
5.8
6.5
7.1
7.7
1625
6.1
6.8
7.4
8.0
1750
6.5
7.1
7.7
8.2
1875
6.8
7.4
7.9
8.5
2000
7.2
7.7
8.2
8.7
2125
7.6
8.0
8.5
9.0
2250
7.9
8.4
8.8
9.3
2375
8.3
8.7
9.2
9.6
2500
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.3
Description
One phase is missing or imbalanced. In
this case the motor will come to a stop
and then automatically restart when all
phases are present.
The rotor is blocked. Once the locking
mechanism has been removed, the
motor will automatically restart.
The motor will stop in the event the
motor over heats. In this case there has
to be a manual restart.
The motor will stop in the event the
electronics over heat. In this case there
has to be a manual restart.
Once the line voltage returns within
permitted operating range, the fan will
automatically restart.
Internal communication error of the
fan's electronics. The fan will restart
automatically, if error is cleared.
1.0
1.2
1.4
1.6
1.8
2.0
8.1
8.6
9.1
9.6
8.3
8.8
9.3
9.8
8.5
9.0
9.5
9.9
8.7
9.2
9.7
9.0
9.5
9.9
9.2
9.7
9.5
10.0
9.8
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.3
Troubleshooting the motor requires a voltmeter.
1.
Disconnect main power to the unit.
2.
Disconnect motor plug in supply section of the unit.
3.
Restore main unit power.
4.
Check for proper line voltage at motor power leads Black
(PL1-1), Yellow (PL1-2), and Blue (PL1-3). Blue is only
present on 3-phase motors. See the following table.
551K Unit Voltage
208/230
460
575
5.
Disconnect main power.
6.
Reconnect motor plug in supply section of unit.
7.
Restore main power.
8.
Check for proper motor control voltage signal of 9.7Vdc
to 10.3Vdc at IFM-1 and IFM-3 on Unit Control Board
(UCB). See Fig. 9.
9.
Using a jumper wire from unit control terminals R to G,
engage motor operation.
10. Verify control signal from user speed selection switch by
placing voltmeter taps in provided terminals marked Vdc.
Signal should be between 3.8Vdc and 10.3Vdc.
11. If the motor does not start and run, remove the fan assem-
bly and replace the motor with one having the same part
number. Do not substitute with an alternate design motor
as the voltage/speed programming will not be the same as
that on an original factory motor.
6
Factory Setting:
7.8 V
DC
Field Setting:
Record field setting here
V
DC
Switch Range:
*
C
B
A
4.1 - 7.5
A
6.9 - 8.7
B
7.7 - 10.0
C
* Overlap in A, B, C switch range
designed for maximum field
adjustment potential. For example
7.2 can be set at either A or B.
Motor Voltage
230
460
575
Min-Max Volts
187-253
360-506
517-633
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Table of Contents
Troubleshooting
