DM14-01.01.18en
MIV V5 Heat Recovery DC Inverter R410A
MS Unit Installation
144
MS02E/N1-C, MS04E/N1-C
Note:
1. The signal wire must use shielding wire. User other wires might cause signal interference and lead to malfunction.
2. All the shielding wires network should be interconnected, and finally connected together to the metal plate grounding.
3. Do not tie up the signal wire together with the refrigerant pipes and power wires etc. When parallel layout the power wire and
signal wire, the distance should be over 300mm.
4. The signal wire cannot be a close loop.
5. The signal wire has polarity, please be careful during wiring.
6. Please use 3-core shielding wire for MS, indoor unit and outdoor unit signal wires (greater than or equal to 0.75mm
2)
). The
signal wire has polarity, it needs correct connection. The MS and outdoor signal wires only can be led out from the outdoor main
unit.
6.3 Check whether the MS and indoor unit signal wire is wired correctly or not.
Spot check:
1. Only power on the MS and indoor units which belong to No. n system;
2. Long press the MS spot check key which is correspond to No. n system for 6s, then No. n system will enter
to spot check mode (MS02, MS04, MS06 has 2, 4, 6 spot check keys separately);
3. After enter spot check mode, the display panel will display “CH”, when No. n system of MS detects the
indoor unit communication signal, the No. n system will immediately operate the solenoid valve under this
system as the following sequence: “SV(n)” ON 10s
→“
SV(n)-B
”
ON 10s
→
repeat the above steps for 3
times
→“
SV(n)
”
and
“
SV(n)-B
”
OFF;
4. If the valve didn’t follow step 3 operation then means the No. n system communication has error, please
check the signal wire connection between No. n system and indoor unit, and then repeat the step 1~3 to check
the No. n system; if the valve followed step 3 operation then means the No. n system communication is normal,
and then can repeat the step 1~3 to check other systems;
Exit spot check:
1. No indoor unit signal is detected in 10 minutes;
2. MS power off;
3. Finish spot check operation.
