SECTION 9
9-4
01/01/2014
SAFETY CIRCUIT MONITOR LIGHTS
HOW THEY WORK!
SAFETY CIRCUIT MONITOR LIGHTS (DS2 – DS8) INDICATE WHAT PART OF THE SAFETY
CIRCUIT IS WORKING. TO FIND THE PROBLEM, PRESS THE POWER SWITCH (SW1) TO
THE "ON" POSITION AND HOLD. FIND THE FIRST LIGHT THAT IS NOT "ON". THAT
WILL SHOW THE DEVICE THAT IS NOT ALLOWING THE SAFETY CIRCUIT TO LOCK IN.
* PLACE ALL SWITCHES IN "OFF" POSITION BEFORE TROUBLE SHOOTING *
SYMPTOMS: A.
NO SAFETY CIRCUIT PROVEN LIGHT (DS11) WHEN THE
POWER SWITCH (SW1) IS ENGAGED, BUT SOME OF THE
SAFETY CIRCUIT MONITOR LIGHTS (DS2 – DS8) WILL
LIGHT WHEN THE POWER SWITCH (SW1) IS ENGAGED BUT
WILL GO "OFF" WHEN THE POWER SWITCH (SW1) IS
RELEASED.
B.
SAFETY CIRCUIT PROVEN LIGHT (DS11) "ON" WHEN THE
POWER SWITCH (SW1) IS ENGAGED BUT WILL GO "OFF"
WHEN THE POWER SWITCH (SW1) IS RELEASED.
POSSIBLE
CAUSES:
A1. DEFECTIVE POWER SWITCH (SW1).
A2.
NO PLENUM HIGH LIMIT LIGHT (DS2), DEFECTIVE HIGH
LIMIT OR HIGH LIMIT TRIPPED FROM EXCESSIVE HEAT IN
PLENUM CHAMBER.
A3.
NO FAN OVERLOAD LIGHT (DS3), DEFECTIVE FAN OVERLOAD
DEVICE (S2, S3, S4, S4), OR STARTER OVERLOAD
TRIPPED FROM A FAN MOTOR DRAWING HIGH AMPERAGE.
A4.
NO CONVEYOR OVERLOAD LIGHT (DS4), DEFECTIVE
CONVEYOR OVERLOAD DEVICE (S5, S6, S7, S8), OR
STARTER OVERLOAD TRIPPED FROM AN AUGER DRAWING HIGH
AMPERAGE.
A5.
NO FEEDROLL MONITOR LIGHT (DS5), DEFECTIVE FEEDROLL
MONITOR SWITCH (SW8) OR CAM NUT, TIMER RELAY (K10,
K11), OR ON/OFF SELECTOR SWITCH (SW7).
A6.
NO DISCHARGE OVERFLOW LIGHT (DS6), DEFECTIVE
DISCHARGE OVERFLOW SWITCH OR OVERFLOW CONDITION HAS
TRIPPED SWITCH.
A7.
NO EXHAUST TEMPERATURE LIMIT LIGHT (DS7), DEFECTIVE
EXHAUST LIMIT OR LIMIT HAS TRIPPED BECAUSE OF
EXCESSIVE EXHAUST AIR TEMPERATURE.
A8.
NO AUXILIARY SAFETY LIGHT (DS8), *CUSTOMER
INSTALLED.*
A9.
DEFECTIVE BURNER SWITCH (SW3).
A10. DEFECTIVE POWER RELAY (K8).
A11. DEFECTIVE SAFETY CIRCUIT PROVEN LIGHT (DS11).
B.
DEFECTIVE FLAME SYSTEM BYPASS DELAY RELAY (K5).
CORRECTIVE
ACTION:
A1.
IF VOLTAGE IS PRESENT ON TERMINAL #25 (120 VOLTS)
THEN CHECK FOR VOLTAGE ON TERMINAL #28 (120 VOLTS)
WHILE HOLDING THE POWER SWITCH (SW1) IN THE "ON"
POSITION. IF NO VOLTAGE IS PRESENT, THE POWER
SWITCH (SW1) IS DEFECTIVE, REPLACE.
Содержание DPX12T
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