Manual 2100-694B
Page
60 of 62
5154-002 FASCO (HEB) Blower Motor (HR35-36 Models Only)
Troubleshooting 5154-002 FASCO (HEB) Motor
1. Remove panels to access the control panel.
2. Connect TEC-EYE
TM
to the PLC.
3. Verify there are no alarms.
NOTE:
Under certain alarms, the blower function
will be disabled. Clear any alarms currently
in the system or make necessary repairs
to clear the alarms. If during testing the
No Airflow alarm is activated, the blower
output will be disabled. If this happens,
follow the instructions below to disable the
airflow alarm. The airflow alarm will need to
be re-enabled after testing in complete.
4. Press MENU key to go to the Main Menu screen.
5. Press UP or DOWN keys and ENTER key to enter
ENGINEER password 9254.
6. Press UP or DOWN keys to scroll to
I/O Config
;
press ENTER key.
7. Press UP or DOWN keys to scroll to
Blower Ouput
C12
.
8. Press ENTER key to scroll to
Blower OV Speed
.
9. Press UP or DOWN keys to adjust value to
50%
;
press ENTER key.
10. Press UP or DOWN keys to change
Override
value
to On; press ENTER key.
11. Blower speed value should change to 50%.
NOTE:
Override only lasts 5 minutes. During
testing, verify the blower speed is staying
at 50%. If not, follow the steps above to
enable override again.
12. Measure VDC between Y1 terminal on PLC and
terminal 20 on the DIN rail.
A. Measurement should be close to 5 VDC.
B. If VDC is correct, move to step 12C. If not,
measure from Y1 to GND on PLC board. If not
close to 5 VDC, replace the PLC board.
C. If measurement is close to 5 VDC, check and
repair wiring to terminal 20 and all connected
grounds on terminals 12-21 on the DIN rail.
13. Remove the blower access panel.
14. Remove 5-pin high voltage plug from blower motor
assembly.
15. With voltmeter set to VAC, verify high voltage on
the 5-pin plug between the red and black wires
(see Figure 65).
A. If correct, remove 16-pin low voltage plug and
move to step 16.
B. If not correct, check voltage source for loose
connection and power wires for damage.
Disabling the No Airflow Alarm with TEC-EYE
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
ENGINEER password 9254.
3. Press UP or DOWN keys to scroll to
I/O Config
;
press ENTER key. the screen will display
Digital In
Config C1.
FIGURE 69
Verifying Voltage on Blower Motor 5-Pin Plug
4. Press ENTER key to scroll to
ON
in the
NoAir
row
and
En
column.
5. Press UP or DOWN keys to change value to
ON
to
OFF
; press ENTER key.
Be sure to re-enable to the airflow alarm after testing is
completed.
16. Remove the 16-pin low voltage plug.
17. For testing voltage output of the low voltage plug,
see Figure 70 and Table 24.
A. If voltages are correct, move to step 18.
B. If plug does not have correct voltage readings,
replace cable assembly.
