22-32-4. Items to Check Before the Test Run(1) Turn the remote power switch ON at least 12 hours in advance in order to energize the crankcase heater.(2)(2)Fully open the closed valves on the liquid-tube and gas-tube sides.2-5. Test Run Using the Remote Controller(1) Press and hold the remote controller button for 4 seconds or longer.Then press the button.“TEST” appears in the LCD display during the test run.Temperature control is not possible when test run mode is engaged.(This mode places a large load on the devices. Use it only when performing the test run.)Use either Heating or Cooling mode to perform the test run.The outdoor unit will not operate for approximately 3 minutesafter the power is turned ON or after it stops operating.(3) If normal operation is not possible, a code appears on the remote controller LCD display.Refer to “2-7. Table of Self-Diagnostic Functions and Corrections”, and correct the problem.After the test run is completed, press the(4) button again.Check that “TEST” disappears from the LCD display.(This remote controller includes a function that cancels test run mode after a 60-minute timer has elapsed,in order to prevent continuous test run operation.)(5) For the test run of an inverter outdoor unit, operate the compressors for a minimum of 10 minutes(in order to check for open phase).* When performing a test run using a wired remote controller, operation is possible without attaching thecassette-type ceiling panel. (“P09” will not be displayed.)2-6. PrecautionsRequest that the customer be presentwhen the test run is performed.At this time, explain the operation manualand have the customer perform the actualsteps.Be sure to pass the manuals and warrantycertificate to the customer.Check that the 220 – 240 V AC power isnot connected to the inter-unit controlwiring connector terminal.* If 220 – 240 V AC is accidentally applied,the indoor or outdoor unit control PCBfuse will blow in order to protect the PCB.Correct the wiring connections, thendisconnect the 2P connectors that areconnected to the PCB, and replace themwith 2P connectors.If operation is still not possible afterchanging the brown connectors,try cutting the varistor.(Be sure to turn the power OFF beforeperforming this work.) Fig. 2-4NOTEOutdoor unit control PCB8 – 10 HPLED1FUSE (0.5A, F500)OC (CN500, BLU)MOV2(CN301, BLK)MOV1(CN300, WHT)EMG (CN502, BRN)SILENT (CN037, WHT)PUMP DOWN (CN048)TEMINAL (CN205, BLK)R.C.ADD. Rotary switchC2 (CN020, WHT)C1 (CN021, WHT)TEST (CN033, RED)TD (CN024, BLK)TO (CN023, BLK)TS (CN022, RED)63PH (CN027, WHT)EXCT(CN030, RED)RC P(CN039, RED)IC002CTL2(CN202, GRN)CTL1(CN203, GRN)FUSE(6.3A, F101)N . P . C H E C K(CN046, RED) LED2MODE (CN038)D115(POWER LED)IC001 R.C.ADD. DIP switchA.ADD (CN047)C-CHK (CN035)EEPROMLED (D041EEPROM LED)