T-365 4–58NOTICEP7-0 & P8 are included with “Auto2 & Auto3” only. P9-0 through P10 are included with “Auto2”only.P7 Tests - High Pressure Tests: Unit is run at full capacity without condenser fan running to make sure that theHPS opens and closes properly.P6-7 Digital Loader/Un-loader Valve TestPasses if pressure and current changes are within predetermined values 3seconds after DLV/DUV switch signal. If it does not pass then refer to Sec-tion 7.19P6-10 Electronic Expan-sion Valve TestThe test records the suction pressure during the open valve position andpasses if the suction pressure increase is above 3 psi when the valve opensfor 10 seconds.CODE TITLE DESCRIPTIONP7-0 High PressureSwitch (HPS)Opening TestTest is skipped if sensed ambient temperature is less than 7.2°C (45°F), re-turn air temperature is less than -17.8°C (0°F), or the water pressure switchis open. With the unit running, the condenser fan is turned off and a 900 sec-ond (15 minute) timer is started. The right display shows Discharge Pressureif the sensor is configured and valid, else Discharge Temperature. The unitneeds to disable Discharge Pressure limit and enable Current Limit checks.The test fails immediately if:-Ambient Temperature Sensor invalid-Composite Return Temperature Sensor invalid-HPS is openThe test fails if:-HPS fails to open before 900 seconds total test time.-Evaporator or Compressor IP Alarm.-Calculated Dome Temperature exceeds 137.78°C (280°F).-Discharge pressure exceeds 370 psig.-Compressor Current exceeds limitsThe test passes if HPS opens within the 15 minute time limit.P7-1 High PressureSwitch (HPS) Clos-ing TestIf return temperature greater than -2.4°C, set setpoint to -5.0°C, else set set-point to -30°C. Restart unit according to normal startup logic. Run unit nor-mally for 120 seconds.The test passes if the high pressure switch closes within 75 seconds afterend of Test 7-0, else the test fails.Test P7-0 must pass for this test to execute.CODE TITLE DESCRIPTION
