Johnson Controls YVAHP072B31S, Service Manual

Page: 401 / 1796

Service Manual
1-385
INSTALLATION
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This controller is not equipped with the Test Run mode.
The test running shall be performed from the outdoor units.
1. Turn ON the power for all indoor units.
2. Models with automatic addressing will take three to
¿ ve minutes to complete the setting.
3. Set the Test Run mode from the outdoor units.
4. Cancellation the Test Run mode.
The Test Run mode can be canceled when:
- Test Run will be
¿ nished automatically after two hours running time.
- Cancel Test Run from the outdoor units.
- Stop Test Run by pressing the On/Off switch at the controller.
The total number of the indoor units connected will
be indicated on the temperature display.
NOTE:
Display indication
when one indoor unit is
connected.
If the indicated number of connected units is incorrect, any communication abnormality because of an incorrect wiring/
addressing or Electromagnetic Interference (EMI) issue may exist. In such a case, turn OFF the power supply and
check the following.
(Do NOT repeat the ON/OFF operation at the main switch within 10 seconds).
(1) Indoor unit(s) power supply not turned ON, or incorrect wiring
(2) Incorrect wiring connection between indoor units or controllers
(3) Incorrect setting of rotary switch (overlapped setting)
ATTENTION:
This controller memorizes a Test Run operation mode. The unit(s) will start in the Test Run mode if the mode of
operation is not changed from the central control equipment which will be used with the unit after Test Run, or from
the controller. Change the mode of operation using these devices or refer to Section 6. “Function Selection and Input/
Output Setting from Controller” (H3 Operation Mode Change Restriction - 02: Unlimited operation) after Test Run.
A. Use AWG 22 (0.32mm
2
) to AWG 18 (0.82mm
2
) cable with a maximum total cable length 98.4 ft. (30m).
If the total cable length is longer than 98.4 ft. (30m), use communication cable of 1P to AWG 18 (0.82mm
2
)
Maximum total cable length 1640.5 ft. (500m). When using with the control timer, the maximum total cable length
is 328.1 ft. (100m).
Using other cables may cause a malfunction because of Electromagnetic Interference (EMI).
B. Maintain a distance of more than 12 inches (30cm) between the controller / indoor unit communication cables and
the power cables.
C. If installed within 12 inches (30cm), put the cables in a conduit tube and ground (type-D; ” 100 ȍ ), one end of the
pipe. Without this procedure, malfunction or failure of the air conditioner because of Electromagnetic Interference
(EMI) may occur.
D. When multiple indoor units are simultaneously controlled, set addresses for the refrigerant cycle and indoor units.
Speci ¿ cally, when the indoor units from multiple refrigerant cycles are simultaneously controlled, a communication
issue may develop due to address duplication.
E. For more information about wiring controller-indoor units and setting indoor unit addresses, see the indoor units
“INSTALLATION MANUAL”.
F. Do not leave any space at the cable opening of the remote controller case. If there is any space, cover it with,
for example, tape to avoid trouble caused by condensation or insects entering the controller case.
NOTICE