York IDH072B21S Series Installation And Maintenance Manual

York IDH072B21S Series Installation And Maintenance Manual Manual pdf 39 page image

P01432Q-rev.1 359. Test RunTest Run Screen9.1 Before Test RunVerify that there are no problems with the installation, and do not perform Test Run until all the followingconditions have been resolved.Refer to the "Installation and Maintenance Manual" for the outdoor unit for details on Test Run operationsfrom the outdoor unit.Verify that refrigerant piping and the communication cable are connected to the same refrigerant cyclesystem. If not, it will cause an abnormal operation and damage to instrumentation.(1) Verify that electrical resistance is more than one megaohm, by measuring the resistance betweenground and the terminal the terminus for electrical components. If the electrical resistance is less thanone megaohm, do NOT operate the system until the electrical current outflow to ground is detected andrepaired. Do not introduce any high voltage to the terminals of the communication cables(TB2 [A, B, 1 and 2]).(2) Verify that each wire is connected correctly at the correct phase for the power supply. If it is incorrectlyconnected, the unit will not operate and the wired controller will display the alarm code “05”. In thiscase, check the phase for the primary power supply according to the “Attention” label affixed to the backside of the service cover. Then, with the power supply turned OFF at the power supply, remake thenecessary connections.(3) Check to ensure that the main power supply has been turned ON for more than 12 hours, to warm upthe compressor oil by the crankcase heater.(4) Verify that all DIP Switch settings are correct. Refer to Section 8.5 “DIP Switch Settings”.9.2 Test RunAfter all installation work is completed, Test Run should be performed.(1) Check to ensure that stop valves (gas and liquid) for the outdoor unit are fully opened.(2) Whenever indoor units are connected to the VRF system, perform the Test Run for the indoor units oneby one sequentially and then check the refrigerant piping system and the electrical wiring system forconformity. (If these multiple indoor units are operated simultaneously, system conformity cannot beverified.)(3) Perform the Test Run in accordance with the following procedure. Ensure that the Test Run is carriedout without any problem. The following procedure shows a case where a wired controller is utilized.If other controllers are activated instead, refer to the "Installation and Maintenance Manual" for thoseother controllers.NOTE:The outdoor unit may not be operated depending on the indoor and outdoor temperature conditions.Refer to the "Installation and Maintenance Manual" for outdoor units for details.(a) Press and hold “Menu” and “Back/Help” simultaneously for at least 3 seconds.The Test Run menu will be displayed.● The Test Run menu will be displayed.BackAdj.Sel. ON RtrnTest Run Setting: 2 unitsMODESPEED AUTOCOOLNOTEWhen the “00 unit” is displayed, the auto-addressfunction may be working.Cancel “Test Run” mode and reset.