YESMake necessary corrections.Check the alarmcontents.Check the alarm contents.Turn OFF the indoor andoutdoor unit powerNO*2*3 *3*2CASE 1CASE 2CASE 3B CASE 3AYESYESNOYESNONONOYESYESNORecheck the items to check before the test run.Are the inter-unit control wiresconnected to more than 1 refrigerantsystem?Is it possible to turn ON the power onlyfor the 1 refrigerant system where thetest run will be performed?Will automatic address setting beperformed in Heating mode?Is it OK to start the compressors?Turn ON the indoor andoutdoor unit power.Short-circuit the mode change pin(CN50) on the outdoor main unit PCB.At the same time, short-circuit theautomatic address pin (CN51) for 1second or longer, then pull it out .Short-circuit the automatic addresspin (CN51) on the outdoor unit PCBfor 1 second or longe r,then release it.Short-circuit the automatic address pin (CN51)on the outdoor unit PCB for 1 second or longe r,then release it.Start indoor and outdoor unitcooling operation.LED 1 and 2 blink alternately.Start indoor and outdoor unitheating operation.LED 1 and 2 blink alternately.LED 1 and 2 blink alternately(about 2 or 3 minutes).Is it OK to start the compressors?Turn ON the indoor andoutdoor unit power.Turn OFF the indoorand outdoor unitTurn ON the indoor andoutdoor unit power for thatrefrigerant system only.Are LEDs 1 and 2 on theoutdoor unit PCB OFF?Are LEDs 1 and 2 on theoutdoor unit PCB OFF?Set the No. of indoor units.Set the system address.When multiple outdoor units exist, disconnect the terminalsextended from the shorted plugs (CN33) at all outdoor main unitPCBs except for 1.Alternatively, move the sockets to the OPEN side .utdoor unit control PCB>Unit No. setting switch(S004)utdoor unit control PCB>Unit No. setting switch(S002 and S003)Refer to Fig. 7-4(Check the link wiring.)Refer to “ Table ofSelf-Diagnostic Functions andDescription of Alarm Displays.”*2 A minimum of 5 hours must have passed after thepower was turned ON to the outdoor unit.*3 All indoor units operate in all refrigerant systemswhere the power is ON.Check that test run preparation is OK.(Do not allow the short-circuited pins to remain short-circuited.)Refer to the RemoteController test-runsettings.Set the Wired Remote Controller for test run.Does system operate?Return Remote Controller to normal modeCheck and make corrections according to“Table of Self-Diagnostic Functions. ”End test run.Make necessarycorrections7-2. Test Run ProcedureItems to Check Before the Test Run1. Turn the remote power switch on atleast 5 hours before the test, in order toenergize the crankcase heater.2. Turn the outdoor service valves (2locations) to the full-open positions.● Use caution when making the settings. Ifthere are duplicated system addresses,or if the settings for the Nos. of theindoor units are not consistent, an alarmwill occur and the system will not start.● These settings are not made on theindoor unit PCB.Fig. 7-334