IV–75L13 Indoor Unit Model Type Setting Failurec Error detection methodErrors are determined when the types, capacity levels and models that cannot be connected have not been set.• When the water heat exchanger unit and an indoor unit other than a water heat exchanger unit have beenconnected together within the same cooling system.• When a cooling coil and an indoor unit other than a cooling coil have been connected together within thesame cooling system.Note: The term “connected together” as used above means “connected in combination” from an electrical pointof view. Consequently, even if the refrigerant tubes are in a different system, they are assumed to beconnected when indoor and outdoor operation wiring is linked and they share the same system address.If this combination represents “models that cannot be used in combination” as explained above, an errorwill be triggered.• When the indoor unit type has been mistakenly set in the remote controller’s advanced mode.d Troubleshooting1Indoor/outdoor unitcheck1-1 Is the connected unit a water heat exchanger unit? Yes 1-2No 1-41-2 Is a unit other than a water heat exchanger unit connected tothe system?Yes 1-3No 1-91-3 An indoor unit other than a water heat exchanger unit is connected together. It is a model thatcannot be connected, so change it to a connectable unit.1-4 Is the connected indoor unit a cooling coil? Yes 1-5No 1-71-5 Is an indoor unit other than a cooling coil connected to thesystem?Yes 1-6No 1-71-6 An indoor unit other than a cooling coil is connected together. It is a model that cannot beconnected, so change it to a connectable unit.1-7Check the type setting (item code 10) for the indoor unit setwith the remote controller’s advanced mode. Does the settingmatch up to the actual indoor unit’s type?* Setting value 32: Cooling coilYes 1-9No 1-81-8Amend the type setting (item code 10) with the remotecontroller’s advanced mode, and reset the power supply forthe outdoor unit. Is the alarm triggered again?Yes 1-9No End1-9There is a chance that the actual piping connections do not match up with the unit’s addresssetting. Check the status of the indoor and outdoor unit connections, and set the addresscorrectly with the remote controller’s advanced mode if there is a problem.If no problem can be found or the problem reoccurs after being repaired, replace the circuitboard.● For information on the remote control’s advanced settings, see Chapter 5 “Reference Document.”* When the address settings for the indoor and outdoor unit and the type settings for the indoor unit have beenamended, make sure that the power supply to the outdoor unit is reset without fail. (The new configurationwill be recognized during initial communications.)
