Midea MCCDH30A-TA3SL Technical & Service Manual Download

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Air-cooled modular chiller unit

d. If it is under the host computer network control, Net-ON displays, otherwise there is no display.
e. If it is under wired controller locked or button locked state, it displays the lock mark. There will be no

display after the lock is unlocked.

Treatment of display data

The data display area is divided into Up area and Down area, with two groups of two-digit half 7-segment

digital display, respectively.
a. Temperature display
Temperature display is used for displaying the total outlet water temperature of unit system, outlet water

temperature ,condenser pipe temperature T3A of system A, condenser pipe temperature T3B of system B,

outdoor environmental temperature T4, anti-freezing temperature T6 and setting temperature Ts, with

allowable data display scope -15

℃～

℃

. If the temperature is higher than 70

℃

, it is displayed as 70

℃

. If

there is no effective date, it displays

“—

—”

and indication point

℃

is on.

b. Current display
Current display is used for displaying modular unit system A compressor current IA or system B compressor

current IB, with allowable display scope 0A~99A. If it is higher than 99A, it is displayed as 99A. If there is no

effective date, it displays “— —” and indication point A is on.
c. Failure display
It is used for displaying the total failure warning date of unit or that of modular unit, with failure display scope

E0~EF, E indicating failure, 0~F indicating failure code. “E-“ is displayed when there is no failure and

indication point # is on at the same time.
d. Protection display
It is used for displaying the total system protection data of unit or the system protection data of modular unit,

with protection display scope P0~PF, P indicating system protection, 0~F indicating protection code. “P-“ is

displayed when there is no failure .
e. Unit number display
It is used for displaying the address number of the currently selected modular unit, with display scope 0~15

and indication point # is on at the same time.
f. Display of online unit number and startup unit number
They are used for displaying the total online modular units of the whole unit system and the number of the

modular unit under running state, respectively, with display scope 0~16.
Any time when the spot check page is entered to display or change modular unit, it is needed to wait for the

up-to-date data of the modular unit received and selected by wired controller. Before receiving the data, the

wired controller only displays “——” on the data display Down area, and the Up area displays the address

number of the modular unit. No page can be turned, which continues until the wired controller receives the

communication data of this modular unit.

Main page display

Main page display consists of several pages and the total number of pages is not fixed.
a. The default display is the first page; other pages are displayed by pressing page-up/down button

circularly.
b. The first page of data display Down area displays the total outlet water temperature, and then the total

outlet water temperature and the outlet water temperature are displayed according to the page number

circularly and in turn.
c. The first page of data display Up area displays the number of online units, and the second page displays

the number of startup running units
d. When all the pages of the main page data are displayed, continue to press page-down button to display

the first page, and press page-up from the first page to display the last page.

Query display

Query page data consist of several pages and the total number of pages is not fixed.