intensity ICHS-420KC-3 Installation & Owner'S Manual Download Page 26

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g. 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 Up area, and the down 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.

8.1.5 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 Up area displays the total outlet
water temperature, and then the total outlet water temperature and
the heat exchanger outlet water temperature are displayed
according to the page number circularly and in turn.
c. The first page of data display Down area displays the number of
online units, and the second page displays the number of startup
running units
d. The first page of data display Down area shows the total load
rate of compressor and the fourth page displays the address
corresponding to unit number.
e. 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.

8.1.6 Query display

Query page data consist of several pages and the total number of
pages is not fixed.
a. Upon entering the spot check page display for the first time, the
default selected 0# modular unit displays the state data of the first
page.
b. Contents in other pages are displayed circularly by pressing the
page-up/down button.
c. Pages 1-7 of data display Up area show condenser pipe
temperature of system A, condenser pipe temperature of system B,
T4 temperature value, TS temperature value, compressor current
of system A, compressor current of system B, and outlet water
temperature of heat exchanger.
d. The first page of data display Down area displays the unit
number.
e. Starting from the eighth page, the data display Up area displays
the failure code of the current modular unit. One failure code may
be displayed at most by turning page. In case of exceeding one
failure, the following ones will not be displayed. If there is no
failure, only one page of failure code displays “E-" and the next
page begins to display protection code.
f. After all the failure codes of the data display Up are displayed,
protection code is displayed. One protection code at most may be
displayed by turning page. In case of exceeding one protection
code, the following ones will not be displayed. If there is no
protection, only one page of protection code displays “P-", and the
next page begins to display the contents of the first page.
g. After all the pages of spot check 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.
h. Select the modular unit address number of spot check by
pressing “address decrease” or “address increase" button to
inquire the running state data of different modular units.
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 Up area, and the down 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.

8.1.7 Care and maintenance

Maintenance of main parts

● Close attention should be paid to the discharge and suction
pressure during the running process. Find out reasons and
eliminate the failure if abnormality is found.
● Control and protect the equipment. See to it that no random
adjustment be made on the set points on site.
● Regularly check whether the electric connection is loose, and
whether there is bad contact at the contact point caused by
oxidation and debris etc., and take timely measures if necessary.
Frequently check the work voltage, current and phase balance.
● Check the reliability of the electric elements in time. Ineffective
and unreliable elements should be replaced in time.

8.1.8 Water quality inspection and dirt remove

a. According to the local water quality, please inspect the water
regularly. We recommended you to respect it a half year a time
and change the circulate water two years a time.
b. After long-time operation, calcium oxide or other minerals will
be settled in the heat transfer surface of the water-side heat
exchanger. These substances will affect the heat transfer
performance when there is too much scale in the heat transfer
surface and sequentially cause that electricity consumption
increases and the discharge pressure is too high (or suction
pressure too low). Organic acids such as formic acid, citric acid
and acetic acid may be used to clean the scale. But in no way
should cleaning agent containing fluoroacetic acid or fluoride
should be used as the water-side heat exchange is made from
stainless steel and is easy to be eroded to cause refrigerant
leakage. Pay attention to the following aspects during the cleaning
and scale-removing process:
● Water-side heat exchanger should be done be professionals.
Please contact the local air-conditioner customer service center.
● Clean the pipe and heat exchanger with clean water after
cleaning agent is used. Conduct water treatment to prevent water
system from being eroded or re-absorption of scale.
● In case of using cleaning agent, adjust the density of the agent,
cleaning time and temperature according to the scale settlement
condition.
● After pickling is completed, neutralization treatment needs to be
done on the waste liquid. Contact relevant company for treating
the treated waste liquid.
● Protection equipments (such as goggles, gloves, mask and
shoes) must be used during the cleaning process to avoid
breathing in or contacting the agent as the cleaning agent and
neutralization agent is corrosive to eyes, skins and nasal mucosa.

8.1.9 Winter shutdown

For shutdown in winter, the surface of the unit outside and inside
should be cleaned and dried. Cover the unit to prevent dust. Open
discharge water valve to discharge the stored water in the clean
water system to prevent freezing accident (it is preferable to inject
antifreezer in the pipe).

8.1.10 Replacing parts

Parts to be replaced should be the ones provided by our company.
Never replace any part with different part.

8.1.11 First startup after shutdown

The following preparations should be made for re-startup of unit
after long-time shutdown:
1) Thoroughly check and clean the unit.
2) Clean water pipe system.
3) Check pump, control valve and other equipments of water pipe
system.
4) Fix connections of all wires.
5) It is a must to electrify the machine before startup.