Johnson Controls YVAHP072B31S, Service Manual

Page: 1452 / 1796

3-138
Service Manual
TROUBLESHOOTING
3.4.1 Test Run Using Wired Controller
(1) Wired Controller (CIW01)
OK
Menu
Back/Help ECO
On/Off
Menu
Button
Back/Help
Button
On/Off
Button
Back
Test Run Setting: 2 units
MODE : COOL
SPEED : AUTO
ON Rtrn Sel. Adj.
Back to (1) after checking
Wired Zone Controller
Indication
No Indication * The power source is not turned ON.
* The connection of the remote control
cable is incorrect.
* The connecting wires of power supply
line are incorrect or loose.
1. Connection between Connector and Wires
2. Connecting Points of Remote Control Cable
3. Contact of Connectors of Remote Control Cable
6. RSW Setting on Indoor Unit Printed Circuit Board
7. Wire Connecting Order of Bridge Cable
8. Connecting Points of Bridge Cable
9. Contact of Connectors of Bridge Cable
* The electrical wiring between indoor unit
and outdoor unit is disconnected, or the
power source is not turned ON.
* The setting of unit number is incorrect.
* The connection of control cables
between each indoor unit are incorrect.
(When one wired zone controller controls
multiple units.)
Number of
connected units
is incorrect.
Fault Inspection Points after the Power Source is OFF
4. Connection Order of each Terminal Block
5. Screw Fastening of each Terminal Block
Normal
Abnormal
Move to (4) on the next page.
(3) Checking Procedures for Abnormalities
If no indication or "00" appears, or the number of units indicated is less than the actual
number of units, there is an abnormality.
If "TEST RUN" and the total number of the units connected
to the wired zone controller (for example "2 units") are indicated
on the wired zone controller, the connection of the remote control
cable is correct.
* The total number of indoor units connected is indicated
on the liquid crystal display (LCD).
* If the indicated number is not equal to the actual number of connected indoor units,
the auto-address function is not performed correctly due to incorrect wiring, or
electromagnetic interference.Turn OFF the power supply, and correct the wiring after
checking the following points. (Do not repeat turning ON and OFF within 10 seconds.)
(a) The power supply for the indoor unit is NOT turned ON or incorrect wiring.
(b) Loose connection between Indoor Units or Wired Zone Controller.
(c) Incorrect Setting of Indoor Unit Address (The indoor unit address is duplicated.)
(1) Turn ON the power source of the indoor and outdoor units.
(2) Set the TEST RUN mode with the wired zone controller.
Press and hold the "Menu" and the "Back/Help" switches
simultaneously for more than three seconds.
Select “Test Run” by pressing “ ” and press “OK”.
The Test Run screen will be displayed.
NOTE:
For other controllers,
refer to the “Installation Manual” for each controller.
NOTE:
When “00 unit” is indicated,
the auto-address function
may be performing.
Cancel “Test Run” mode
and set it again.
Wired Controller
Indication
If "TEST RUN" and the total number of the units connected
to the wired controller (for example "2 units") are indicated
on the wired controller, the connection of the controller cable
is correct.
(2) Set the TEST RUN mode with the wired controller.
(b) Loose connection between Indoor Units or Wired Controller.
* The connection of the controller cable
is incorrect.
(When one wired controller controls
multiple units.)
1. Connection between Connector and Wires
2. Connecting Points of Controller Cable
3. Contact of Connectors of Controller Cable
buttons