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6-56.TestrunFig. 6-4CZ-RTC41 Press and hold the button for 4 seconds orOperates the unit with the thermostat forced ON.longer.2 “ ” appears on the remote controller LCDdisplay (Fig. 6-4).3 Press the button to start the test run.The outdoor units will not operate forapproximately 3 minutes after the poweris turned ON and after operation is stopped.4 Press the button to return to normal remote controller display.5 For the test run of an inverter outdoor unit, operate the compressors for a minimum of 10 minutes.• The temperature cannot be adjusted in Test Run mode.(This mode places a heavy load on the machines.Therefore use it only when performing the test run.)• The test run can be performed using the HEAT, COOL,or FAN operation modes.• To prevent continuous test runs, this remote controller includes a timer function that cancels the test run after60 minutes.• The operation is possible even if the cassette-type ceiling panel has not been installed.(“P09” display does not occur.)• If correct operation is not possible, an error code isdisplayed on the remote controller LCD display.34126-6. PrecautionsRequest that the customer be present when the test run is performed. At this time, explain the operation manualand have the customer perform the actual steps.Be sure to pass the manuals and warranty certificate to the customer.Check that the AC 230 / 208 V power is not connected to the inter-unit control wiring connector terminal.* If AC 230 / 208 V is accidentally applied, the indoor or outdoor unit control PCB fuse (0.5A for both indoorand outdoor units) will blow in order to protect the PCB. Correct the wiring connections, then disconnect the2P connectors (indoor: blue, OC) (outdoor: blue, OC) that are connected to the PCB, and replace them with2P connectors (indoor: brown, EMG) (outdoor: brown, EMG). (Refer to the figure below.) If operation is still notpossible after changing the brown connectors, try cutting the varistor (VA002) (both indoor and outdoor).(Be sure to turn the power OFF before performing this work.)Indoorunit control PCB Outdoorunit control PCBIC8Varistor (black)FuseVA002CN44 EMGCN40 OCVA002 (Varistor)OC (blue)connector0.5A0.5ATerminal plug (black)3 – 5 HPEMG (brown) connectorFig. 6-5Fuse6
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