McQuay MDS080BR Installation Guide Page 106

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Design & installation Guide For McQuay MDS Multi System
6.1 User Guide
6.1.1 Responsibilities and Obligations
This product is covered under MacQuay warranty during the warranty period.
Only MacQuay technicians or experienced professionals designated by MacQuay are al-
lowed to install, test, repair and maintain this product series.
6.1.2 Unpacking Inspection
Upon receipt of the units, please check them against the packing list. Check carefully if the
units are damaged during the transportation, and if all the components are complete and in good
condition. In case of any damaged unit or missing parts, please inform MacQuay's local branch
or dealer in writing immediately.
6.1.3 Using the Units
The total installed capacity of indoor units can be greater than but not more than 130% of
the capacity of outdoor units. However, when the total capacity of indoor units in operation
must not exceed that of the outdoor units. Otherwise, the output of each indoor unit can
reach their rated value;
All the indoor units are powered in a centralized manner. Before servicing and maintenance,
be sure to turn off the main power between the units;
After receiving the stop signal, each indoor unit will have its fan and electronic expansion
valve running for another 20~60 seconds, to make use of the afterheat or the cool air that
remains in the heat exchanger and also to get ready for the next start. This is normal.
When the running mode of the indoor unit is in conflict with the running mode of the outdoor
unit, the hand controller will display a message indicating this indoor unit stops running
because of the operation conflict. In this case, you can switch the indoor unit to a running
mode not conflicting with the outdoor unit, to restore the system to normal. The cooling
mode does not conflict with the dehumidifying mode, while the air supply mode does not
agree with any other mode.
The digital compressor adjusts the volume of refrigerant by opening and closing the PWM
solenoid. While the solenoid is operating, it clicks periodically. This is normal.
Servicing and Maintenance
CHAPTER
6
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