Johnson Controls YVAHP072B31S, Руководство по обслуживанию

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Service Manual
1-365
INSTALLATION
ATTENTION:
Disconnect all power at the main power source before performing electrical work. Failure to do this can result in
¿ re,
damage to internal components and severe or fatal electrical shock.
Max. 16 Indoor Units
Controller
A B A B
Controller
(Secondary)
M3
Screws
Electrical Box
of Indoor Unit Electrical Box
of Indoor Unit
Terminal Board Terminal Board
M3.5
Screws M3.5
Screws
Twist Pair Cable with Shield Tube: 1P- AWG 18(0.82mm 2 ) or more
A A
B B
4. Electrical Wiring
Example of Communication Cabling:
A. Communication cabling shall be a minimum of 18-Gauge, 2-Conductor, Stranded Copper. Shielded cable must be
considered for applications and routing in areas of high EMI and other sources of potentially excessive electrical noise
to reduce the potential for communication errors. When shielded cabling is applied, proper bonding and termination
of the cable shield is required as per Johnson Controls guidelines. Plenum and riser ratings for communication cables
must be considered per application and local code requirements. The use of any other grade of cable other than that
speci
¿ ed above can result in damage from electronic interference (EMI).
B. Maintain a distance more than 11-13/16 inches (30cm) between the communication cables, (controller cable and
communication cables) and power source of the indoor units. If this is not done, the unit can malfunction due to
electromagnetic interference (EMI) generated by incoming power cables from the power source.
C. In systems where multiple indoor units are in synchronized control under a single controller, assign the refrigerant
cycle numbers and address for indoor units without duplication.
D. Refer to the Technical Catalog provided with each indoor unit when performing electrical wiring work between the
controller and indoor units for setting the refrigerant cycle number and the indoor unit address.
E. No gap should exist between the controller cable and the cable access inlet of the controller box casing. If there is a
gap, cover and seal the gap with vinyl tape. Failure to insulate against the penetration of moisture and insects can
result in degraded performance and damage to the unit.
F. If case of operating with two controllers (Primary and Secondary), set the primary and secondary controllers by
selecting the appropriate function for those controllers. Refer to Section 6. After this is set, turn OFF the power
supply to all indoor units connected to these controllers.
Back
Test Run Setting: 2 units
MODE : COOL
SPEED :
ON Rtrn Sel. Adj.
5. Checking Procedures
1. Turn ON the power supply
for all the indoor units.
2. For models equipped with
an auto-address function,
wait approximately 3
minutes. This function
is being automatically
performed. (There is
a built-in
¿ ve minute
requirement according to
the setting condition.)
After that, select using
language from the “Menu”.
Refer to the operation
manual for details.
3. Press and hold “Menu”
and “Back/Help”
simultaneously for at least
three seconds. The Test
Run menu will display.
4. Select “Test Run” by
pressing “ ” and press
“OK”. The Test Run screen
will be displayed.
Ɣ The Test Run screen is displayed.
6. Canceling “Test Run” Mode
When “00” is displayed,
the auto-address function
may be activated.
Cancel “Test Run” mode
and set it again.
* The total number of the indoor units connected is indicated
on the LCD (liquid crystal display).
* If a number other than a correct number is displayed, the
auto-address function will not work properly due to improper
wiring or electrican interference and so forth.
Turn OFF the power supply, check the following items and
perform the correct connection.
(Do not repeat turning ON and OFF within 10 seconds.)
1. The power supply to the indoor unit was not turned ON or
there is an incorrect wiring issue.
2. There was an incorrect connection issue regarding
interconnecting cables between indoor units or of the
controller cable.
3. There was an incorrect setting of the rotary switch and
DIP switches (the settings were overlapped), on the
printed circuit board (PCB) for the indoor unit.
5. Test Run
Ɣ Press “ ” (On/Off) to again to activate Test Run.
Ɣ Press “ ” and set each item.
NOTE
1. When the unit is not in operation, press “Back/Help”.
2.
When the unit is in operation, press “ ” (On/Off).
Use AWG 18 (0.82mm2) cable, (18-Gauge, 2-Conductor, Stranded Copper).