Carrier VECTOR 1550 Series Operation & Service Manual

62-61753-21 3-43.4 PRETRIPCOOL DEFROST ALARM START-STOPERUTAREPMETXOBTNIOPTESALARM LIST SELECTMANUALDEFROSTSUOUNITNOCTAEHTEST #12. Press the SELECT key until the MessageCenterdisplays “PRESS THE = KEY TO START PRETRIP”.3. Press the ”=” key to start PRETRIP.4. Verify that during TEST#1 (5 seconds) the complete display is turned on and that all lights on theLight Bar come on.5. Verify that during the first 5 seconds of TEST#2 the buzzer comes on.6. The remainder of Pretrip will take 7 to 15 minutes, and will run itself automatically.START--STOP/CONTINUOUS1. Place SROS in the “START / RUN” position.KEYPAD+34.5° F--20.0XX% COMPLETEThe PRETRIP mode is for checking unit operation andevaluating operation of all modes. It will indicate afailure when one is detected.TIPA Pretrip can be started at any refrigeratedcompartment temperature.The MessageCenter displays the current test and the% complete of the test. When the Pretrip tests arecomplete the MessageCenter will display one of threedifferent messages: "PRETRIP PASS" or "PRETRIP FAIL IN TEST X" or "PRETRIP FAILED & COMPLETE" and alarm lightis ONPress the ALARM LIST key to review the alarms trig-gered by the Pretrip tests.TIPThe Pretrip test "PASS" results message willstay displayed until a key is pressed, or untilthe SROS switch is placed in the Off position.The Pretrip test "FAIL" results message willstay displayed until the alarms are clearedOnce Pretrip is started, the keypad keys are disableduntil Pretrip is completed.TIPIf "CAN NOT START PRETRIP" is displayedin the MessageCenter, check to see if the unitis in Defrost Mode, or check the alarm list(Section 3.11) for active shutdown alarms.NOTEPretrip will run until completed, unless analarm occurs that causes Pretrip to be abort-ed. Only alarms that will result in other errone-ous alarms or will affect future Pretrip tests willallow Pretrip to be aborted.