SECTION 9
9-26
01/01/2014
AUTOMATIC SYSTEM SENSES GRAIN TEMPERATURE IN THE GRAIN
COLUMN AND ADJUSTS THE DISCHARGE RATE AS NECESSARY TO AID
IN MAINTAINING A CONSISTENT GRAIN MOISTURE LEVEL.
NOTE
: UNLOAD AUGER AND AUXILIARY UNLOAD SYSTEM MUST BE
"ON" BEFORE METERING SYSTEM IS ENERGIZED.
SYMPTOMS:
A. RATE OF DISCHARGE CANNOT BE ADJUSTED.
B. NOT MAINTAINING A CONSISTENT GRAIN MOISTURE LEVEL.
POSSIBLE
CAUSES:
A1. DEFECTIVE METERING SELECTOR SWITCH (SW6).
A2. DEFECTIVE AUTOMATIC MOISTURE RELAY (K12).
A3. DEFECTIVE MOISTURE SENSOR OR SENSOR WIRING.
A4. DEFECTIVE AUTOMATIC METERING CONTROL (TC2).
B1. IMPROPER SETTING OF MOISTURE CONTROL SYSTEM.
B2.
INCORRECT CONFIGURATION OF AUTOMATIC METERING
CONTROL (TC2).
CORRECTIVE
ACTION: A1.
IF VOLTAGE IS PRESENT ON TERMINAL #64 (120 VOLTS)
WITH METERING SELECTOR SWITCH (SW6) "ON" - "AUTO"
POSITION, THEN CHECK FOR VOLTAGE ON TERMINAL #76.
IF VOLTAGE IS NOT PRESENT THE METERING SELECTOR
SWITCH (SW6) IS DEFECTIVE, REPLACE.
A2. IF VOLTAGE IS PRESENT ON TERMINAL #76 (120 VOLTS)
WITH METERING SELECTOR SWITCH (SW6) "ON" - "AUTO"
POSITION, CHECK AUTOMATIC MOISTURE RELAY (K12) TO
ENSURE CONTACTS ARE CLOSING. IF NOT, RELAY IS
DEFECTIVE, REPLACE.
A3.
REFER TO ERROR MESSAGES CHART ON PAGE 9-29.
A4.
CHECK AUTOMATIC METERING CONTROL AS FOLLOWS:
STEP 1: CHECK SUPPLY VOLTAGE (120 VOLTS) WITH A
VOLT METER BETWEEN TERMINALS 98 AND 99 ON
THE CONTROL. IF THE SUPPLY VOLTAGE IS NOT
PRESENT, CHECK THE POWER SOURCE FOR
PROBLEMS.
STEP 2: CHECK THE 0-10 VDC OUTPUT BY MEASURING
WITH A VOM BETWEEN THE F1(+) AND G1(-)
TERMINALS. IF 0-10 VDC IS NOT PRESENT OR
IS OUT OF TOLERANCE, CONSIDER THE CONTROL
TO BE DEFECTIVE AND REPLACE.
B1A. FINAL GRAIN MOISTURE LEVEL WAS NOT STABILIZED IN
MANUAL MODE BEFORE SWITCHING TO AUTOMATIC MODE.
RETURN TO MANUAL MODE AND STABILIZE MOISTURE LEVEL.
NOTE
: A COMPLETE CYCLE OF GRAIN FLOW THROUGH THE
DRYER MUST OCCUR BEFORE SEEING AN ACCURATE
GRAIN MOISTURE LEVEL. THIS TIME IS
DETERMINED BY THE MOISTURE CONTENT OF THE
GRAIN ENTERING THE DRYER AND THE DESIRED
Summary of Contents for DPX12T
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Page 55: ...Page 17 Moisture Control All Models 6 21 2012 ...
Page 56: ...Page 18 Moisture Control All Models 6 21 2012 Alarm Limit Indication Error Messages ...
Page 57: ...Page 19 Moisture Control All Models 6 21 2012 ...
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Page 66: ...SECTION 7 7 1 1 13 2010 GRAIN SHRINKAGE TABLE SHRINKAGE WHEN GRAIN IS DRIED TO THESE LEVELS ...
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