Bryant 551K 04N Series, Инструкции по обслуживанию и техническому обслуживанию

Страница: 6 / 92

6
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
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.
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.
Factory Setting:
7.8 V
DC
Field Setting:
V
DC
Switch Range:
A
B
C
B
A
C
Field Accessories:
ESP in. wg
V
DC
Calculator
CFM
0.2
5.4
5.8
6.1
6.5
6.8
7.2
7.6
7.9
8.3
1500
1625
1750
1875
2000
2125
2250
2375
2500
0.1
0.4
6.2
6.5
6.8
7.1
7.4
7.7
8.0
8.4
8.7
0.1
0.6
6.9
7.1
7.4
7.7
7.9
8.2
8.5
8.8
0.1
0.8
7.5
7.7
8.0
8.2
8.5
8.7
9.0
0.1
1.0
8.1
8.3
8.5
8.7
9.0
0.1
1.2
8.6
8.8
9.0
9.2
0.1
1.4
9.1
9.3
9.5
0.1
1.6 1.8 2.0
9.6
0.1
Economizer
1 Stage E Heat
2 Stage E Heat
UNIT MODEL
NUMBER
4.1 - 7.5
6.9 - 8.7
7.7 - 10.0
0.2
0.3 0.2
0.3 0.2
0.3 0.2
0.3 0.2
0.3 0.2
0.3 0.2
0.3 0.2
0.3
9.8
9.9
9.7
9.9
9.5
9.7
10.0
9.2
9.5
9.8
9.3
9.6
9.2
Record field setting here
*
* 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.
Fault
Condition
Reset
Trigger
Description
Phase Failure Automatic
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.
Locked/ Blocked
Rotor
Automatic
The rotor is blocked. Once the locking
mechanism has been removed, the
motor will automatically restart.
Motor Over
Heated
Manual
The motor will stop in the event the
motor over heats. In this case there has
to be a manual restart.
Power Module
Over Heated
Manual
The motor will stop in the event the
electronics over heat. In this case there
has to be a manual restart.
Line under-
voltage
Automatic
Once the line voltage returns within
permitted operating range, the fan will
automatically restart.
Communication
Error
Automatic
Internal communication error of the
fan’s electronics. The fan will restart
automatically, if error is cleared.
551K Unit Voltage Motor Voltage Min-Max Volts
208/230 230 187-253
460 460 360-506
575 575 517-633