Farm Fans C-2120A, Руководство оператора, Страница: 61 / 68

A voltmeter is required for some of the following checkout
procedures. Before performing any tests, make certain to
determine if dryer power supply is 1-phase 230V, 3-phase
230V, or 3-phase 460V.
The burner control circuit is 230 volts on all standard U.S.
production dryers. When performing tests within the burner
circuit, measure voltage ACROSS BOTH SIDES OF THE
LINES AND NOT TO GROUND.
The general control circuit and safety circuits are 115 volt on
all model dryers. When checking these circuits, MEASURE
VOLTAGE BETWEEN THE CIRCUIT TEST LOCATION
AND GROUND.
REFER TO WIRING DIAGRAMS AND PARTS LIST FOR
IDENTIFICATION OF PARTS AND ELECTRICAL TERMI-
NALS. When right- or left-hand side of dryer is mentioned,
it is as viewed from the rear end of the dryer.
CAUTION: When making high voltage tests with
live circuits, be extremely careful—follow estab-
lished safety practices. Turn power ON for test-
ing only. DO NOT ATTEMPT TO MAKE THE
DRYER OPERATE BY USING A JUMPER WIRE TO
BYPASS A DEFECTIVE COMPONENT.
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1. POWER SUPPLY - Check that MAIN POWER SUPPLY and CIRCUIT BREAKERS are turned ON.
Also check for a tripped circuit breaker.
2. FUSES - Check for blown safety circuit fuse(s). See appropriate POWER CIRCUIT diagram for
location and number used.
3. OVERLOAD RELAY - Check for tripped overload relay.
4. STOP OR START SWITCHES - Check for a defective STOP or START switch. Also check switch
wiring connections.
5. 1CR RELAY - Check for a defective 1CR relay, relay base, or faulty wiring.
TROUBLE CHECKOUT PROCEDURE & INFORMATION
Control circuit not
energized -
Shutdown indicator
light ON.
—— SHUTDOWN INDICATOR LIGHTS - on ASC Panel ——
• LOW GRAIN LIGHT
Auto-resets immediately. May indicate:
a. Insufficient grain to fill dryer.
b. Load Timer is set incorrectly:
- load time set too low
- timer set to incorrect range
- timer memory set incorrectly to ON
c. Failed load drive
• METER ROLL MONITOR LIGHT
Auto-resets immediately. Indicates meter roll rotation has not been sensed for three minutes due to
the following possible reasons:
a. Meter roll selector switch is OFF.
b. Meter rolls are jammed.
c. Meter roll drive failed.
d. Meter roll proximity switch requires adjustment.
NOTE: It is normal for the meter roll light to be ON when circuit breakers are powered, but the
Control Circuit has not been started.
• GRAIN HI-LIMIT LIGHT
Auto-resets after cooling. Indicates that the RH and/or LH grain column high limit switch has
reached 210°F.
a. Grain has over-dried due to:
- Unload Auger is turned OFF
- Meter roll speed is set too low
- Batch dry timer set too long
- Moisture control temperature is set too high
- Grain column is plugged
- Meter roll system has jammed or failed
b. Failed grain hi-limit thermostat
• BURNER HIGH LIMIT LIGHT
Auto-resets after cooling. Indicates burner high limit switch has reached 200°F for the following
possible reasons:
a. Inadequate air flow:
Control circuit not
energized - Shutdown
indicator lights OFF.