Basic Troubleshooting; Equipment Cannot Be Started; Cannot Find The Equipment/Equipment Is Disconnected; Display Errors On The Webpage - Midea CCM-270A/WS Service Manual

CCM-270A/WS

1 Basic Troubleshooting

In this section we will discuss about some basic troubleshooting for the CCM-270A/WS. Also, are listed some preliminary
steps that are required to be taken to eliminate these problems. Let us have a look at some of the basic troubles that may
be encountered by the users while using CCM-270A/WS.

1.1 Equipment cannot be started

Solution: First of all, check whether the red coloured system lightings inside the back panel of the CCM-270A/WS are
blinking or not. If not blinking, it indicates that the power is not getting supplied. Check whether the power cable is
properly connected or not. If the system LEDs are blinking but the CCM-270A/WS screen remains black for some time,
check whether the signal lines of the screen are connected to the main board properly. (Disassembling is required)

1.2 Cannot find the equipment/Equipment is disconnected.

Solution: The solution for this problem is discussed in two parts as follows:
1. If no information is available for all the buses, please check whether ODU has started, whether wires are normal and
the wiring sequence at the port is correct.
2. If only part of equipment information is available and IDU information is absent, please check the PQE wires
connecting IDU and ODU; If ODU (slave) information is absent, check the H1H2E wires connecting ODUs; If the entire
system is absent, check H1H2E wires connecting systems.

1.3 Display Errors on the Webpage

Solution: If there are display errors on the webpage such as header errors and wrong icon placements, ensure that you use
a latest browser atleast chrome 52 or later versions. Use the browser's mandatory refresh function to refresh the page
(such as "Shift+F5" for the Chrome browser).

1.4 Wrong Error Code displayed

Solution: The error code shown in the indoor unit on the old platform is different from the error code shown in the nixie
tube display of the indoor unit.

1.5 Power Allocation for Public Devices

Solution: For those marked as public devices, its power will be shared to all enabled devices during power allocation.
Power from public devices is shared equally to other devices where fees are being charged. It does not distinguish the time
settings. Once it is set as a public device, all queries will see that device as a public device (power allocation is only
effective during the query; the database records the original file and the calculations are performed only during the
query).
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