FDEx2 INSTRUCTION MANUAL FDEx2 INSTRUCTION MANUAL
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6. TESTING PROCEDURE
6.1 THERMOSTATIC FUNCTION
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1. Connect the FDEx2 to a source of variable AC voltage such as a Variac. Adjust the output of the Variac to a good starting
voltage (within the acceptable limits). The power LED will be flashing at a rate of 2 seconds ON / 2 seconds OFF if the
temperature detected by the regulation temperature probe (Probe#1) is below the cut-in temperature. If the temperature is
above the cut-in value, then the power LED will flash at a rate of 1 second ON / 1 second OFF
2. When the Intelligent Time Delay is over, the FDEx2 will connect the mains supply to the compressor (assuming the
temperature sensed by Probe#1 is above the cut-in temperature). The power LED will be ON.
3. Once the cabinet has reached the desired temperature (the temperature sensed by Probe#1 drops below the cut-out
temperature), the FDEx2 will disconnect the compressor and the power LED will be flashing at a rate of 2 seconds ON / 2
seconds OFF (which indicates the incoming voltage is good and compressor is satisfied).
6.2 DEFROST FUNCTION
Note: This test may take a long time to wait for either the defrost start time to be over or for the evaporator temperature to drop
below the defrost start temperature.
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1. Connect the FDEx2 to a source of variable AC voltage such as a Variac. Adjust the output of the Variac to a good starting
voltage (within the acceptable limits). The power LED will flash at a rate of 1 second ON / 1 second OFF for the duration of
the protection time delay (assuming the temperature is above the cut-in value)
2. When the Intelligent Time Delay is over, the FDEx2 will turn on the compressor and the power LED will be ON.
3. The unit will go into defrost as soon as one of the defrost start criteria is met. This could be either defrost start time is over
or the evaporator temperature drops below defrost start temperature value, whichever happens first, or is activated. The
power LED will flash 4 seconds ON / 4 seconds OFF, and the compressor and other outputs will act according to the set
operation, turning ON if set to ON.
4. The unit will stay in defrost until one of the defrost end criteria is met. This could be either defrost end duration is over or the
evaporator temperature has risen above defrost end temperature value, whichever happens first, or is activated.
Test Operation - Immediate Defrost at Power UP Enabled
1. Connect the FDEx2 to a variable power source such as a variac and ensure the output of the Variac is at a good starting
voltage.
2. When powered up, if the defrost enable temperature is met, the FDEx2 will enter defrost. The power LED will flash 4 seconds
ON / 4 seconds OFF, and the compressor and other outputs will act according to the set operation, turning ON if set to ON.
3. The unit will stay in defrost until one of the defrost end criteria is met. This could be either defrost end duration is over or the
evaporator temperature has risen above defrost end temperature value, whichever happens first, or is activated.
Note: Ensure to disable this feature and reprogram the FDEx2 before sending the cooler/controller to market.
6.3 VOLTAGE PROTECTION FUNCTION
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1. Connect the FDEx2 to a variable power source such as a variac and ensure the output of the Variac is at a good starting
voltage (within the acceptable limits). The power LED will be flashing at a rate of 1 second ON / 1 second OFF for the
duration of the protection time delay (assuming the temperature is above the cut-in value)
2. When the Intelligent Time Delay is over, the FDEx2 will turn on the compressor and the power LED will now be ON.
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3. Slowly decrease the voltage until the power LED momentarily switches OFF. The power LED will stay OFF for the duration
of the Under Voltage Blind Time (2 seconds),
4. Then the FDEx2 will disconnect the outputs and the power LED starts flashing fast at a rate of 0.5 seconds ON / 0.5 seconds
OFF. This represents the Low Voltage Disconnect voltage.
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5. Increase the voltage slowly until the power LED starts flashing at a slower rate (1 second ON/1 second OFF). This represents
the Low Voltage Reconnect voltage.
6. Wait for the Protection Time Delay, then the power LED will be ON.
7. Repeat steps 3 to 6 but increase the voltage to test the overvoltage.
• The High Voltage Blind Time is 0.5 seconds.
Note: Low/high Blind Times are Sollatek recommended timings. Blind times are configuarble in the desktop configuration
interface so actual timings may differ from the times stated depending on your settings.
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