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Resumen del manual
P3 Low Speed Evaporator Fans Requirements: The unit must be equipped with a low speed evaporator fan, as determined by the Evaporator Fan speed select configuration variable. P3-0 Low Speed Evaporator Fan Motors On Setup: The high speed evaporator fans will be turned on for 10 seconds, then off for two seconds, then the low speed evaporator fans are turned on. A current draw test is done after 60 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test. P3-1 Low Speed Evaporator Fan Motors Off Setup: The low speed Evaporator Fan is turned off, a current draw test is done after 10 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test. P4-0 High Speed Evaporator Fan Motors On Setup: The high speed Evaporator Fan is turned on, a current draw test is done after 60 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test. P4-1 High Speed Evaporator Fan Motors Off Setup: The high speed Evaporator Fan is turned off, a current draw test is done after 10 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test. P5-0 Supply/Return Probe Test Setup: The High Speed Evaporator Fan is turned on and run for eight minutes, with all other outputs de-energized. Pass/Fail Criteria: A temperature comparison is made between the return and supply probes. NOTE If this test fails, “P5-0” and “FAIL” will be displayed. If both Probe tests (this test and the PRIMARY/ SECONDARY) pass, the display will read “P5” “PASS.” 3-21 T-309 Table 3-7 Controller Pre-Trip Test Codes (Sheet 2 of 4) P5-1 Supply Probe Test Requirements: For units equipped with secondary supply probe only. Pass/Fail Criteria: The temperature difference between primary and secondary probe (supply) is compared. NOTE If this test fails, “P5-1” and FAIL will be displayed. If both Probe tests (this and the SUPPLY/ RETURN TEST) pass, because of the multiple tests, the display will read ’P 5’ ’PASS’. P5-2 Return Probe Test Requirements: For units equipped with secondary return probe only. Pass/Fail Criteria: The temperature difference between primary and secondary probe (return) is compared. NOTES 1. If this test fails, “P5-2” and “FAIL” will be displayed. If both Probe tests (this test and the SUPPLY/ RETURN) pass, because of the multiple tests, the display will read “P 5,” “PASS.” 2. The results of Pre-Trip tests 5-0, 5-1 and 5-2 will be used to activate or clear control probe alarms. P6 Refrigerant Probes, Compressor and Refrigeration valves Setup: The system is operated through a sequence of events to test the components. The sequence is: Step 1, de- -- energize all outputs; Step 2, start unit with unloader valve open. Open then close the suction modulation valve. Monitor suction pressure; Step 3, open suction modulation valve to a known position; Step 4, close suction modulation valve to a know position; Step 5, open economizer valve; Step 6, close unloader valve; Step 7, open unloader valve; Step 8, close economizer valve; Step 9, de- -- energize all outputs. P6-0 Discharge Thermistor Test If alarm 64 is activated any time during the first 45 second period of Step 1, the test fails. P6-1 Suction Thermistor Test If alarm 69 is activated any time during the first 45 second period of Step 1, the test fails. P6-2 Discharge Pressure Sensor Test If alarm 65 is activated any time during the first 45 second period of Step 1, the test fails. P6-3 Suction Pressure Sensor Test If alarm 66 is activated any time during the first 45 second period of Step 1, the test fails. P6-4 Compressor Current Draw Test Compressor current is tested before and after start up. If current does not increase, the test fails. P6-5 Suction Modulation Valve Test Suction pressure is measured before and after the valve opens. If suction pressure does not increase, the test fails. P6-6 Economizer Valve Test Suction pressure is measured during Steps 4 and 5. If suction pressure does not increase, the test fails. P6-7 Unloader Valve Test Suction pressure is measured during Steps 6 and 7. If suction pressure does not increase, the test fails. T-309 3-22 Table 3-7 Temperature Controller Pre-Trip Test Codes (Sheet 3 of 4) NOTE P7-0 through P10 are included with the “Auto2” only. P7-0 High Pressure S i h Cl d g Switch Closed NOTE This test is skipped if the sensed ambient temperature is less than 7_C (45_F), the return air temperature is less than - -- 17.8_C(0_F), the water pressure switch is open or the condenser fan switch is open. Setup: With the unit running, the condenser fan is de-energized, and a 15 minute timer is started. Pass/Fail Criteria: The test fails if high pressure switch fails to open in 15 minutes. P7-1 High Pressure Switch Open Requirements: Test P7-0 must pass for this test ...
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