Carrier 69NT40-561-399 Operation And Service Manual

Contents

T-365 5–6e. GAS LIMIT (gASLM)In GAS LIMIT mode, access to the submenu is available provided a perishable set point has beenselected, and a valid reading is detected from the CO 2 sensor. In “Gas limit” mode the microprocessorwill monitor and limit the level of CO 2 in the container by opening and closing the eAutoFresh vent. Thevent will open to the (FLO) setting once the unit has completed initial temperature pull down or if thecargo temperature is within 5C of set point and the CO2 level has reached the max limit or if the O2 levelhas reached the lower limit. After the first 15 minutes of the vent opening the controller will again evalu-ate the level of CO2 , and/or O 2 levels. If after the first 15 minutes the gas limit values are satisfied, thevent will close, if either gas limit has not been satisfied within 15 minutes the air exchange vent will openin 10 CMH increments every 15 minutes until both gas concentrations are satisfied. Once all limits aresatisfied the vent will return to the closed position. If conditions are not met with the slide open 100% for90 minutes AL29 will be activated.To operate in GAS LIMIT mode, scroll until gASLM appears in the left window, and press ENTER to acti-vate the submenu. The first selection is the maximum CO 2 level (CO2LM). Select the maximum CO 2level by using the UP and DOWN arrow keys. The range is from 0 to 19% in 1% increments. PressENTER to set the value and move to the minimum O 2 level (O2LM). The range is from 2% to 20% in 1%increments. Press ENTER to set the value and move to the FLO rate. Use the UP or DOWN arrow keyto scroll to the desired FLO rate. The range is from 0 to 220CM (0 to 129CF) in increments of 5 and 3respectively. Press ENTER to set the value and begin operation.Operational Parameters (Sub Menu Options):FLO indicates the opening to which the slide will move based on the stored value in CMH (in incrementsof 5) or CFM depending on the selection of Cd46 (Airflow display units), Cd28 (Metric/Imperial) or thepressing of the deg C/F key. CFM is displayed as CF, CMH is displayed as CM.tIM is the time delay prior to the door opening. The time range is from 1 to 72 hrs in 1 hr increments.CO2LM is the maximum level of CO 2 that is allowed for the cargo. The range is from 0% to 19% in 1%increments, the default setting is 10.O2LM is the minimum level of O 2 that is allowed for the cargo. The range is from 2% to 20% in 1% incre-ments, the default setting is 10.Rtn is an offset value used to expand the return air temperature value to compensate for the fresh airentering the container. The allowable range is from 0.6°C to 2.8°C or 1.0°F to 5.0°F in 0.1 incrementsthe default setting is 2.8°C (5°F).5.5 CONNECT REMOTE MONITORING RECEPTACLEIf remote monitoring is required, connect the remote monitor plug at the unit receptacle, see Figure 3.5. When theremote monitor plug is connected to the remote monitoring receptacle, the following remote circuits are energized:5.6 STARTING AND STOPPING INSTRUCTIONSWARNING!Make sure that the unit circuit breaker(s) (CB−1 & CB−2) and the START−STOP switch (ST) arein the “O” (OFF) position before connecting to any electrical power source.CIRCUIT FUNCTIONSockets B to A Energizes remote cool lightSockets C to A Energizes remote defrost lightSockets D to A Energizes remote in−range light