21
EC Motor Won’t Start:
Disconnect power before plugging/ unplugging motor cables.
CAUTION – motor is supplied with 120 VAC continuously.
24VAC thermostat signals communicate with the motor to
initiate operation.
1.
Circuit board controls the blower motor in Heating mode.
Check that LOW FAN or HIGH FAN LED is illuminated.
Also check for 24VAC at these terminals on the circuit board.
If faulty refer to “Faulty Circuit Board” section.
2.
Ensure motor cables are properly installed and firmly plugged
into the motor. Check voltages in the cables.
3.
Check door switch depressed, power supply, and thermostat
lines are wired properly. Refer to the electrical diagram
supplied with each air handler.
4.
Check the voltages at motor plugs (120VAC and 24VAC).
5.
There may be a faulty TAP on the motor. Select a different
speed on the motor tap selection tree. Refer to the “Selecting
Fan Speeds” section.
6.
Possible defective motor. Contact Enerzone for assistance.
When ordering a new motor the air handler model number and
serial number will be required. Each EC motor must be
programmed with the same torque settings as the original
motor to operate properly.
Содержание CAH 33-44-50
Страница 1: ...CAH SERIES INSTALLATION MAINTENANCE MODELS CAH 33 44 50 CAH 49 54 70 ...
Страница 10: ...10 Figure 3 Figure 4 Figure 3 Correct way to install duct work Figure 4 Incorrect way to install duct work ...
Страница 11: ...11 Typical Air Handler Schematic ...
Страница 23: ...23 WIRING DIAGRAMS ...
