S3 (1~4) capacity of the outdoor unit:MDS-A
Address No. 5 6 7 8
3HP 0 0 0 0
4HP 0 0 0 1
5HP 0 0 1 0
6HP 0 0 1 1
S3 (1~4) capacity of the outdoor unit:MDS-B
Address No. 1 2 3 4
8HP 0 0 0 0
10HP 0 0 0 1
12HP 0 0 1 0
15HP 0 0 1 1
18HP 0 1 0 0
20HP 0 1 0 1
22HP 0 1 1 0
26HP 0 1 1 1
28HP 1 0 0 0
32HP 1 0 0 1
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Design & installation Guide For McQuay MDS Multi System
5.2 Trial Run
Precautions
Power up the system 12 hours while you run it for the first time so that the shaft can be
preheated in advance;
After the main power supply is switched off, please don start the second trial run until the
system is powered for 2.5 hours;
If the heater is not heated, to protect the compressor, don't start the system until it is powered
for 2 hours.
Check the power supply between the outdoor units and the distribution unit (it is
recommended you use a 3-phase detector).
Check the indoor units.
Check the power cable and the signal cable of each indoor unit are properly connected (the
signal cable is marked with A and B);
If the power cable is mixed with the signal cable, the circuit board might go faulty.
Although the signal cable is not marked in color, please note the color, because the signal
cable features polarity;
Check if the addresses are correctly set for the indoor units;
Address switches begin with 0;
Each indoor unit must be configured with a different address.
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