3–9 62-11785
3.6 PRETRIP - Continued
Test 2 - 12VDC Electrical Component Amperage Check - Test 2 will check the amperage (current) draw of the fol-
lowing components:
• Battery Amp Draw (All Components Turned Off).
• Liquid Injection Valve
• Condenser Fan Contactor #1
• Condenser Fan Contactor #2
• Evaporator Fan Contactor
• Compressor Contactor
• Standby Contactor #1
• Standby Contactor #2
• Heater #1 Contactor
• Heater #2 Contactor
Each component will be individually checked for proper current draw. An alarm will be activated for any component
not drawing amperage in the expected range.
Test 3 - Temperature Sensor Check - Check the condition of all of the system temperature sensors. Test 3 will
last approximately 5 seconds. If a problem is detected with any of the sensors, the corresponding alarm will be acti-
vated. Refer to Alarm Section 7.3.
Test 7 - Electric Heater Amperage Check - Each heater will be energized individually and checked for proper cur-
rent draw. An alarm will be activated for any heater not drawing amperage in the expected range; P00187 CHECK
HEATER 1 CIRCUIT / P00188 CHECK HEATER 2 CIRCUIT
Test 8 - Evaporator Fan Motor - The evaporator motor contactor will be energized and the motor checked for
proper current draw. Alarm P00188 CHECK HEATER 2 CIRCUIT will be activated if the evaporator fan motor is not
drawing amperage in the expected range.
Test 9 - Condenser Fan Motors - The condenser fan motor contactors will be energized and the motors checked
for proper current draw. Alarm P00190 CHECK CONDENSER FAN MOTOR or P11000 CHECK CONDENSER
FAN MOTOR 2 will be activated if a condenser fan motor is not drawing amperage in the expected range.
Test 10 - Check Suction Modulation Valve (CSMV) - This test is run to ensure that the CSMV is opening and
closing properly. If suction pressure doesn’t change as expected with CSMV closed, then alarm P00180 CHECK
SUCTION MOD VALVE will be displayed.
Test 11 - Evaporator Expansion Valve (EVXV) - This test is an operational check of the EVXV. If evaporator outlet
pressure doesn’t change as expected with the EVXV closed then alarm P00177 CHECK EXV (EVXV) SUPER-
HEAT will be displayed.
Test 12 - Economizer Expansion Valve (ECXV) - This test is an operational check of the ECXV. If economizer
outlet pressure doesn’t change as expected with the ECXV closed then alarm P00173 CHECK ECONOMIZER will
be displayed.
Test 13 - Liquid Injection Solenoid Valve (LIV) - This test checks the operation of the liquid injection solenoid
valve. If compressor suction temperature does not change when LIV is energized, alarm P00179 CHECK LIV will
be displayed.
Pretrip Termination - When the Pretrip cycle is completed, the unit will return to normal temperature control oper-
ation. “PRETRIP PASS” will be displayed until the operator presses the EXIT key. In the event that the Pretrip test
activates an alarm(s), either “PRETRIP FAIL & COMPLETE” (if the entire Pretrip cycle was completed), or “PRE-
TRIP FAIL IN TEST XX”, (if the Pretrip cycle was aborted by an alarm before it was completed) will be displayed.
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