Wunder-Bar JoeTap NITCOM - Verify Inverter Is Working;Replace Inverter Page

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e. Press the “ ’’ key once, it will display “dF” (means defrosting). Press the “ ” key once again, it will display
“00-99” minutes of the Defrost Duration. Use the “+” key to increase the time or reduce the time by
pressing the “-” key to adjust the Defrost Duration to 60mins if necessary.
f. Press the “ ’’ key once, it will display the “CU” (means Accumulation). Then press the “ ’’ key once again,
it will display “00-99” hours of the Cumulative Working Time of Compressor. Press the “+” and “-” key to
adjust Cumulative Working Time of Compressor to 06 if necessary.
g. Press the “ ’’ key once again, it will display the “HF” (means set Offset Temperature). Press the “ ’’ key
once again, it will display the Offset Temperature (range -20℉~20℉). Using the example in Step ‘d’ – you
would LOWER the offset to 2°F. The process can be summarized in the equation seen in Figure 64.
h. Press the “ ’’ key once again, it will quit, and your settings will be saved. Display should read ‘ON’. See
Figure 65 for summary of the settings.
Setting
Value
Setpoint
38F
Defrost Duration (dF)
60mins
Defrost Period (CU)
06mins
Offset Temperature set (HF)
(32 - Ct reading at 00 Offset) + 2
8. Verify Inverter Is Working:
a. Verify if the inverter is faulty:
i. Unplug the unit and plug it back in, note that there is a 5-minute delay (to protect the compressor from
short cycling). If the refrigerator is calling for cooling, there will be a small blue dot illuminated on the
display. The compressor should be running if the dot is illuminated. See Figure 66.
ii. Within the first 10 minutes of plugging the unit in press and hold the “+” icon and then press and hold
the “ ” icon for 3 seconds.
• All sections on the 7-segment led on the UI should illuminate for 3 seconds.
• If there is a Thermistor error, “E1” will be displayed. See Appendix L: Fridge Thermistor Replacement
Procedure for directions.
Figure 66: Compressor on/off indicator shown.
Figure 65: Calibration value summary.
Figure 64: Offset Temperature Calculation
Example.
New Offset = (Water Temp - Ct reading at 00 Offset) + 2
New Offset = (32 - 33) + 2
01 = -1 + 2