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4/21 IOM-MAC-700-INST
Nailor Industries Inc. reserves the right to change any information concerning product or specification without notice or obligation.
MOTOR / BLOWER REMOVAL AND REPLACEMENT • MODEL MAC-700
WARNING! Disconnect the unit from the electrical power source before attempting to service the unit.
Step 1
Turn off the unit with the ON / OFF button located on the back of the unit.
Step 2
Disconnect the unit at the power source.
Step 3
Using Door key; open the unit door.
Step 4
Disconnect wiring from the control panel.
Step 5
Using a screwdriver; remove the four screws located around the motor and move the blower-motor
assembly out of the unit.
Step 6
Make sure to reconnect all wiring harnesses according to the wiring diagram. dirt and duct should not
be allowed to accumulate on the bower wheel or housing. This can result in an unbalanced blower
wheel and damage the wheel or motor.
Step 7
Reverse above steps to reassemble the motor blower assembly into the unit.
TROUBLE SHOOTING
WARNING! Disconnect the unit from the electrical power source before attempting to service the unit.
Unit will not run:
Confirm that the power cord is plugged into the building receptacle and power is present.
Confirm illuminated ON/OFF push button is pushed in.
Check the speed controller and note that:
1. Motor/Blower is delayed by 20 - 30 seconds.
2. Motor turns off below 1.5 scale while the unit is ON.
3. Ensure your speed is above this point.
Check wires connection between control box and motor per wiring diagram provided with unit.
Check that motor has power at correct voltage.
Check the motor and replace if necessary.
Low Air Flow
Check pre-filter media and remove obstruction as necessary.
Replace dirty pre-filter media.
Adjust the motor speed by rotating speed controller knob clockwise.
Check power supply for proper voltage, amperage, and distribution frequency.
Replace HEPA filter if the velocity remains low.
High Air Flow
Adjust the motor speed by rotating speed controller knob counterclockwise.
Verify all filters are properly in place.
