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.

Note THE UNIT STOPS when the Manual Function Test menu is entered. A technician can then select the control circuit or component to be checked/tested from the items shown in the menu.

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):

  1. Press the PTI key to open the PTI Menu.

  2. Press the F2 OR F3 UP/DOWN key to scroll to “Manual Function Test”.

  3. Press the F4 key to enter the Manual Function Test Menu.

Unit Component Test

  1. Press the F2 OR F3 UP/DOWN key to scroll to desired component test:

    • [PHASE DIRECTION]

    • [HEATER]

    • [COMPRESSOR]

    • [EVAPORATOR FAN HIGH]

    • [EVAPORATOR FAN LOW]

    • [CONDENSER FAN]

    • [ECONOMIZER VALVE]

    • [DIGITAL VALVE]

  2. Press the F4 key to start the component test. Display will change the component state from off to on.

  3. Verify component performance: Display will show expected current and actual current on phase 1, 2, and 3.

  4. 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)

  1. Press the F2 OR F3 UP/DOWN key to scroll to the first component.

  2. Press the F4 key to turn the component on

  3. Press the F3 key to scroll to select next component. Press the F4 key to turn the component on.

  4. Repeat step 3 until all required components are on. For example, to operate unit in Full Cool mode, start the following components:

    • Condenser Fan

    • Compressor

    • Capacity 100 percent

    • Evaporator High or Low

  5. Observe current draw and system performance to verify component(s) performance.

  6. 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, 32, 33, 34, 35, 60, 97, 98, 120, 121, 123 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:

  • 40’SL:

    • 1.0 Amps approx. at 50 Hz

    • 1.0 Amps approx. at 60 Hz

  • + 20’SL: ,

    • 1.5 Amps approx. at 50 Hz

    • 1.5 Amps approx. at 60 Hz

Amperes are recorded in the PTI log.

 14, 15 5 seconds X X X

EVAP FAN HIGH SPEED TEST

SUP RET EVA

5.1C 5.0C 5.1C

2.4A 2.3A 2.4A

With evaporator fan on high speed, amp draw is measured and compared to the expected amp draw, in respect to voltage and frequency. If the minimum phase amp draw is less than 70% of the maximal amp draw both alarm is set.

  • 40’SL:

    • 2.1 Amps approx. at 50 Hz

    • 2.5 Amps approx. at 60 Hz

  • 20’SL:

    • 2.7 Amps approx. at 50 Hz

    • 3.2 Amps approx. at 60 Hz

Amperes are recorded in the PTI log.

 12, 13 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.

  • Expected Power Consumption:

    • 1.2 Amps approx. at 50 Hz

    • 1.5 Amps approx. at 60 Hz

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 high speed for maximum 3 minutes. Then probe test runs until temperature difference between sensors stops increasing. Maximum temperature difference allowed:

  • Return/Evaporator: 1.5C (34.7F); return air sensor temperature must be 0.5C (32.9F) above evaporator sensor temperature.

  • Return/Supply: 0.8C (33.0F); return air sensor temperature must be 0.5C (32.9F) above supply air temperature.

  • LH Supply/RH Supply (if equipped): 0.5C (32.9F).

128, 129, 130

 1 minute minimum to 13 minutes maximum X 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 and compressor 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.

  • 4.4 Amps approx. at 400V

  • 5.1 Amps approx. at 460V

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 X —
TEMPERATURE STABILISATION With evaporator fan on high speed awaiting the supply, return and evaporator temperatures to stabilize. Delta SUP-RET and Delta RET-EVA must be stable, within 7 seconds. Awaiting temperature stability None 20 to 180 seconds X X —

PRE HEAT TEST

SUP RET EVA

5.1C 5.0C 5.1C

2.3A 2.1A 2.3A

 Test is skipped if return air temperature is at 5C or above. With electric heaters turned on and evaporator fan on high speed, the test will end when return air temperature is at 5C or above. Heating until 5C/41F None Instant to 2 hours X X —

PRE COOL TEST

SUP RET EVA

5.1C 5.0C 5.1C

2.3A 2.1A 2.3A

 If the return air temperature is below 15C (68F) the test is skipped. Unit operates in cool until the return sensor is less then +15C (59F) or 1 hour Cooling until 15C/59F. None Instant to 2 hours X X —
VENTILATING If heater or compressor has been running in the preceding test, the unit is ventilated with evaporator fan on high speed. Ventilating None 60 seconds X X X

COMPRESSOR TEST

AMB CON EVA

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 DIGITAL TEST

AMB CON EVA

8.0C 25.0C 2.0C

9.1A 9.0A 9.1A

 Compressor running loaded, evaporator fan at high speed, and condenser fan maintaining 30-35degC for 15 sec. Next the compressor is unloaded and running for 10 sec Amp draw difference is measured and expected to be at least 0,9 Amp (Con > 35C) or 1,5 Amp (Con < 35C). 119 25 to 35 seconds X X X

COMPRESSOR ECONOMIZER TEST

AMB CON EVA

8.0C 45.0C 1.0C

9.1A 9.0A 9.1A

 With compressor on (loaded), condenser and evaporator fans at high speed are turned on for 30 seconds. If condenser fan temperature is below 30C (86F) then the test is aborted. Vapor injection valve is turned on. Amp draw difference is measured and verified to be minimum 0.4 amps. Evaluating Power Consumption Increase 26 Max 90 seconds X X X
HIGH PRESSURE CUTOUT TEST

Running with compressor fully loaded and with evaporator fan at high speed, awaiting high pressure cut out. The test is ended if the condenser coil probe reads temperature above 70ºC and the HPCO does not occurs. The time observing is depending on the startup temperature and will be increased as long as the condenser temperature is increasing.

After the HPCO the compressor signal is removed and the condenser fan is activated to lower the pressure in the condenser. When the temperature gets below 40ºC the compressor is also activated. The test will then look for when the HPCO gets back to normal in maximal 60 seconds. Awaiting HPCO - Compressor stop

 53, 54 Max 200 seconds X X —
CAPACITY TEST With compressor fully loaded condenser fan on and evaporator fan at high speed running for the time period. At the end of the test is the cooling capability evaluated. Evaluating cooling capability 22 180 seconds for 40’ and 240 seconds for 20’ unit. — X —
APPROACHING 0 TEST Probe readings and time are recorded in the pti log when started. When supply air temperature is at 0 deg C / 32F the test is ended. If the test is not ended within the time limit the alarm is set. Approaching 0C/32F 23 Max 2 hours X — —
MAINTAINING 0C TEST With the unit running chilled – Non-Optimized, maintaining 0 deg C / 32F. After 30 minutes the probe readings and time are recorded in the pti log. Maintaining 0C/32F None 30 minutes X 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 X X
PULLDOWN TO -18 C TEST With the unit running frozen, approaching -18 deg C / 0F. Probe readings and time are recorded in the pti log when started and when ended. When return air temperature is at -18 deg C / 0F the test is ended. If the test is not ended within the time limit the alarm is set. Approaching -18C/0F 22 Max 3 hours X 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

RUNNING PTI

0°C / 32°F

00:00:00

0.0C 10.0C 10.0C

 Unit operates in normal mode with 0C (32F) setpoint for 30 minutes after previous test is completed. At the end of 30 minutes, “Chill End” temperatures are recorded in PTI log. Sensor values for supply, return and evaporator sensors are recorded in the event log.
Note Controlling Sensor = Supply
 None Max 120 minutes X — —

RUNNING PTI

DEFROST

00:00:00

-18.0C 10.0C 10.0C

 Unit operates in normal mode with -18C (0F) setpoint and defrost activated. Defrost terminates when evaporator temperature increases to 18C (65F).
Note Controlling Sensor = Return
 20 30 minutes X — —

RUNNING PTI

-18°C / 0°F

00:00:00

-18.0C 10.0C 10.0C

Unit operates in normal mode with -18C (0F) setpoint. When return air temperature decreases to setpoint, Frozen Arrival” temperatures are recorded in PTI log.

“PTI End” are recorded in PTI log and a Trip Start is automatically activated.

Note Controlling Sensor = Return
 22, 60 Max 90 minutes 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
 None Max 180 minutes X — —
*Readings may vary depending on voltage and temperature
Parent topic: PTI (Pretrip) Tests