Manual Function Test
The Manual Function Test menu allows technicians to perform specific diagnostic tests on individual components or turn several components on at the same time to perform a system test.
Complete the following steps to enter the Manual Function Test menu. With the unit turned On, allow it to start and stabilize and the display to show the unit status display (setpoint):
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Press the PTI key to open the PTI Menu.
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Press the F2 OR F3 UP/DOWN key to scroll to “Manual Function Test”.
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Press the F4 key to enter the Manual Function Test Menu.
Unit Component Test
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Press the F2 OR F3 UP/DOWN key to scroll to desired component test:
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[PHASE DIRECTION]
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[HEATER]
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[COMPRESSOR HIGH T] (R134a)
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[COMPRESSOR LOW T] (R23)
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[EVAPORATOR FAN LOW]
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[CONDENSER FAN]
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Press the F4 key to start the component test. Display will change the component state from off to on.
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Verify component performance: Display will show expected current and actual current on phase 1, 2, and 3.
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Press the F4 key again to stop test. Display will change component state from on to off.
System Test (test multiple components at the same time)
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Press the F2 OR F3 UP/DOWN key to scroll to the first component.
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Press the F4 key to turn the component on
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Press the F3 key to scroll to select next component. Press the F4 key to turn the component on.
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Repeat step 3 until all required components are on. For example, to operate unit in Full Cool mode, start the following components:
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Condenser Fan
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Compressor
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Evaporator Low
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Observe current draw and system performance to verify component(s) performance.
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Press the F4 key again to turn off components individually. Or press the F1 key to exit Manual Function Test menu and turn all components off.
Press the F1 key to exit the Manual Function Test submenu.
PTI, Brief PTI, Function Tests
| Display* | Description | Possible Alarms | Duration (Time) | PTI | Brief PTI | Function Test |
|---|---|---|---|---|---|---|
|
PTI START Activated 0.1A 0.0A 0.1A |
Event Log for PTI begins. Awaits phase selection, and surveillance to start up. All alarms are turned off. Alarm list is cleared. All relays are turned off and air vent are closed. | 18 | 1 to 100 seconds | X | X | X |
|
SENSOR TEST Activated 0.1A 0.0A 0.1A |
Testing sensor interface, All sensors must have values within their measuring range. | 00, 01, 02, 03, 04, 05, 34, 35, 97, 98, 120, 121, 123, 144, 145, 148 | Instant | X | X | X |
|
EVAP FAN LOW SPEED TEST SUP RET EVA 5.1C 5.0C 5.1C 1.1A 1.0A 1.1A |
With evaporator fan on low speed, amp draw is measured and compared to the expected amp draw, in respect to voltage and frequency:
|
14, 15 | 5 seconds | X | X | X |
|
COND FAN TEST SUP RET EVA 5.2C 5.0C 5.1C 1.3A 1.2A 1.3A |
With condenser fan on, amp draw is measured and compared to the expected amp draw, in respect to voltage and frequency. If the phase amp draw differs more than 1,0 Amp both alarm is set.
Amperes are recorded in the PTI log. |
16, 17 | 5 seconds | X | X | X |
|
PROBE TEST SUP RET EVA 5.1C 5.0C 5.1C 2.4A 2.3A 2.4A |
Evaporator fans operate on low speed for maximum 3 minutes.
Then probe test runs until temperature difference between sensors
stops increasing. Maximum temperature difference allowed:
|
52, 128, 129, 130 | 1 minute minimum to 13 minutes maximum | X | X | — |
|
REVERSE PHASE TEST SUP RET EVA 1.3C 1.0C 1.3C 1.3A 1.2A 1.3A |
With condenser fan on, reverse phase selector relay is energized. Condenser fan reverse current is measured. | 58 | 30 seconds | X | X | X |
|
HEATER TEST SUP RET EVA 1.3C 1.0C 1.3C 5.2A 5.1A 5.2A |
Electric heaters are turned on. Amp draw is measured to the expected amp draw, in respect to voltage and frequency.
Amperes are recorded in the PTI log. |
10, 11 | 5 seconds | X | X | X |
|
DEFROST TEST SUP RET EVA 5.0C 12.0C 15.0C 5.2A 5.1A 5.2A |
If evaporator temperature is below +10C, heater remains on until evaporator temperature is above +18C. Defrosting until EVA > 18C/64F | 20 | 0-90 Minutes at voltage above 440V 0-120 Minutes at voltage below 440V | X | — | — |
|
COMPRESSOR R23 TEST 8.0C 15.0C 5.0C 9.1A 9.0A 9.1A |
Compressor loaded, and condenser fan activated for 10 sec. Followed by compressor run alone for 7 sec before the amp draw is measured and compared to the expected amp draw, in respect to voltage and frequency. Amperes are recorded in the PTI log. Evaluating power consumption | 6, 7 | 18 seconds | X | X | X |
| COMPRESSOR 2 (R134a) FEEDBACK TEST | Running compressor 2 R134a. Checking if feedback signal from R134a contactor matches the output signal to activate the contactor. | 147 | 25 to 35 seconds | X | X | X |
| PULLDOWN -30C | Unit operates in normal cool mode with -30 C (-22 F) setpoint. When return air temperature decreases to setpoint. Sensor temperatures are recorded in PTI log | 23 | Max 4 hours | X | - | - |
| PULLDOWN -60C | Unit operates in normal cool mode with -60 C (-76 F) setpoint. When return air temperature decreases to setpoint. Sensor temperatures are recorded in PTI log | 22 | Max 8 hours | X | - | - |
| DEFROST TEST | Test is skipped and Fail if either of alarm 4,5,130 is present. Test is skipped if evaporator temperature is at 5degC or above. With electric heaters turned on, the test will pass when evaporator temperature reach 18degC or above. Defrosting until EVA > 18C/64F | 4, 5, 20, 130 | 0 to 90 minutes at voltage above 440V 0 to 120 minutes at voltages below 440V | X | — | — |
| PTI END |
“PTI End” are recorded in PTI log and a Trip Start is automatically activated. All alarms are cleared and must be acknowledged by the user. Unit awaits an ACCEPT of the just ended test before returning to normal operation. PASSED - PASSED - PASSED FAILED - FAILED - FAILED |
26 | Max 90 seconds | X | X | X |
| PTI PASS – PRESS KEY |
Unit will remain OFF until any key is pressed. If alarms occurred during PTI, Display shows “PTI FAIL – PRESS KEY”. Note Controlling Sensor = Return
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None | X | X | X | |
| *Readings may vary depending on voltage and temperature | ||||||