Carrier 50KC04-06 Service And Maintenance Instructions

49CHECKOUTInspect all wiring connections at the economizer module’s termi-nals, and verify compliance with the installation wiring diagrams.For checkout, review the Status of each configured parameter andperform the Checkout tests.NOTE: For information about menu navigation and use of thekeypad see Interface Overview on page 40.Power UpAfter the W7220 module is mounted and wired, apply power.Initial Menu DisplayOn initial start up, Honeywell displays on the first line andeconomizer W7220 on the second line. After a brief pause, therevision of the software appears on the first line and the secondline will be blank.Power Loss (Outage or Brownout)All set points and advanced settings are restored after any pow-er loss or interruption.NOTE: All settings are stored in non-volatile flash memory.StatusUse the Status menu (see Table 12) to check the parameter val-ues for the various devices and sensors configured.NOTE: For information about menu navigation and use of thekeypad, see Interface Overview on page 40.Checkout TestsUse the Checkout menu (see page 45) to test the damper opera-tion and any configured outputs. Only items that are config-ured are shown in the Checkout menu.NOTE: For information about menu navigation and use of thekeypad, see Interface Overview on page 40.To perform a Checkout test:1. Scroll to the desired test in the Checkout menu using the▲ and ▼ buttons.2. Press the (Enter) button to select the item. RUN?appears.3. Press the (Enter) button to start the test. The unitpauses and then displays IN PROGRESS. When the test iscomplete, DONE appears.4. When all desired parameters have been tested, press the(Menu Up) button to end the test.The Checkout tests can all be performed at the time of installa-tion or at any time during the operation of the system as a testthat the system is operable.TROUBLESHOOTINGAlarmsThe economizer module provides alarm messages that displayon the 2-line LCD.NOTE: Upon power up, the module waits 60 minutes beforechecking for alarms. This allows time for all the configured devic-es (e.g. sensors, actuator) to become operational. The exception isthe SAT sensor which will alarm immediately.If one or more alarms are present and there has been no keypadactivity for at least 5 minutes, the Alarms menu displays andcycles through the active alarms.You can also navigate to the Alarms menu at any time.Clearing AlarmsOnce the alarm has been identified and the cause has been re-moved (e.g. replaced faulty sensor) the alarm can be clearedfrom the display.To clear an alarm, perform the following:1. Navigate to the desired alarm.2. Press the (Enter) button. ERASE? displays.3. Press the (Enter) button. ALARM ERASED displays.4. Press the (Menu up/Exit) button to complete theaction and return to the previous menu.If the alarm still exists after clearing it, it is redisplayed within5 seconds.WIRING DIAGRAMSSee Fig. 63 and 64 for typical wiring diagrams.CAUTIONFailure to follow this caution may result in damage to equip-ment. Be sure to allow enough time for compressor start-upand shutdown between checkout tests so that you do not short-cycle the compressors.