MAU Installation Manual
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21
a. Check that the control relay is functioning properly. Make sure there is 24VAC across the
control relay and that you can hear it snap close when the Fan Only is switched on.
b. If no voltage is present, trouble shoot CPT-2
c. Refer the wiring schematic and check for continuity through the control relay.
This completes the startup and troubleshooting section of the King MAU.
MAINTENANCE
Very little maintenance is required for the MAU to keep it functioning properly throughout the year.
1. It is recommended to clean the exterior hood of the fresh air intake once a year.
2. Replace the air filter every 6 months. Shut off the unit before removing the filter.
3. Dust the device regularly to prevent dust from accumulating, which could cause the device to
overheat.
4. Disconnect the power supply to the circuit breaker/fuse before cleaning the unit.
5. If the MAU is located in a dusty area, use a vacuum cleaner to thoroughly clean the unit.
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