Johnson Controls YVAHP0721CW Series, Service Manual

Page: 80 / 416

1-66
SM-16007
INSTALLATION
9. Test Run
Test Run should be performed in accordance with Section 9.2. Use Table 9.1 for recording the Test Run.
An electrical shock will occur if there is residual voltage.
Turn OFF power at the power source completely before attempting any electrical maintenance work.
Verify that no residual voltage exists after turning OFF the power at the power source.
9.1 Before Test Run
(1) Check to ensure that the refrigerant piping and communication lines between indoor and outdoor units
are connected into the same refrigerant system. If not, the result will be abnormal operation with a
potentially serious accident.
Verify that all DIP switch settings for the refrigerant system numbers: (DSW1 and RSW1 [O.U.], DSW5
and RSW2 [I.U.]) and the unit number (RSW) for indoor units are applicable to the system.
&RQ¿UPWKDWDOO',3VZLWFKVHWWLQJVRQWKHSULQWHGFLUFXLWERDUGIRULQGRRUDQGRXWGRRUXQLWVDUHFRUUHFW
Pay special attention to the setting for outdoor unit number, the refrigerant system number, and end
terminal resistance. Refer to Section 7; “Electrical Wiring”.
(2) Verify that electrical resistance is more than 1 megaohm, by measuring the resistance between ground
and the terminal for electrical components. If the electrical resistance is less than 1 megohm, do not
RSHUDWHWKHV\VWHPXQWLOWKHVRXUFHRIHOHFWULFDOFXUUHQWRXWÀRZLVIRXQGDQG¿[HG5HIHUWR³&DXWLRQ
for Insulation Resistance” for details.)
Do not impress the voltage on the terminals for communication lines; (Outdoor Unit: TB2 1, 2, 3, 4 /
Indoor Unit: TB2 A, B, 1, 2). Otherwise, failure can result
.
(3) Verify that each wire, L1, L2, and L3, is correctly connected at the power source.
If any one of those is incorrectly connected, the unit will not operate and the wired controller will
display the alarm code “05”. In this case, check and change the phase of the power source according
to the spec sheet attached to the reverse back surface of the service cover.
(4) Apply power to outdoor unit(s) at least 12 hours prior to operation of the system to allow for adequate
pre-heating of the compressor oil.
The outdoor unit does not operate for at most four hours after power supply (Stoppage Code d1-22).
If operation resumes within four hours, release the protection control as follows:
1. Supply power to the outdoor unit.
2. Wait for 30 seconds.
3. Push PSW5 on the outdoor PCB for more than three seconds in order to release the d1-22.
If using a wired controller for release:
* Press and hold “Menu” and “Back/Help” simultaneously for at least 3 seconds. The test run menu
will be displayed.
* Press “ ” or “ ” to select “Cancel Preheating Control”. Press “OK” and cancel the pre-heating
control.
NOTE:
As for other controllers, refer to the “Installation and Maintenance Manual” attached to each controller.
(5) Be sure to close the service cover at the front lower side when the test run is performed.
NOTICE
Do not activate the system until all issues have been examined and cleared.
Test Run of indoor unit: refer to the installation and maintenance manual which is attached to the indoor unit.