UD-35 SERVICE UPDATE FIRST HALF—2009 - Whirlpool
UD-35 SERVICE UPDATE FIRST HALF—2009 - Whirlpool
UD-35 SERVICE UPDATE FIRST HALF—2009 - Whirlpool
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KABIR DIAGNOSTIC INVERTER<br />
This change will greatly improve the diagnosis of compressor, control and inverter<br />
failures.<br />
Note: Diagnostics aren’t foolproof. Since there is no communication between<br />
the inverter and the Gemini, the inverter displays the most likely failure. The<br />
intent is to point the Tech in the right direction.<br />
AIR DOOR<br />
•<br />
DIAGNOSTIC CODE<br />
• LED Off: No failure detected<br />
• 2 Flashes: No 3-6vdc signal from the<br />
control<br />
• 3 Flashes: Inverter failure<br />
• 4 Flashes: Compressor failure or full<br />
restriction<br />
Air door is driven by a stepper motor.<br />
- Each phase 370 Ω – 460 Ω<br />
- WH to BU and YL to RD should each be 370-460Ω<br />
- Operated by 12VDC pulses<br />
- 200 pulses/second<br />
- 1750 steps open to close<br />
78<br />
Note: Always check wires and connectors<br />
first<br />
During operation (diagnostic step 6), either AC or DC can be measured to ground (e.g. P6-6) VOM<br />
should show 6 to 8 V.<br />
Air Door<br />
VOM voltage readings will show “average” readings of 12V pulses. Diagnostic Step 6 will operate the<br />
door operate the door just once in each direction. On the French Door, diagnostic steps 11 and 14 operate<br />
the same way for the left & right bins, respectively.
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