Shizuoka Seiki VAL6 EPX Series Maintenance Manual Download Page 4 | Manualshive

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3sec

ignition delay

Fuel pre-heater

Plug

IN

Switch

ON

2sec

10sec

10sec

200sec

Fuel Pump

pump delay

post ignition

post purge

within

4

Sequence Time Chart

Ignition

Switch

OFF

Flame Monitor

Operation Switch

Fan Motor

Igniter

5

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Summary of Contents for VAL6 EPX Series

Page 1: ...VAL6 EPX Maintenance Manual ...

Page 2: ...1 Names of components ...

Page 3: ... Burner Control for EP6JA 2 Specifications 3 Wiring Diagram Wiring Diagram 0 75gal 60 H for H lot 0 85gal 60 H ...

Page 4: ...on delay Fuel pre heater Plug IN Switch ON 2sec 10sec 10sec 200sec Fuel Pump pump delay post ignition post purge within 4 Sequence Time Chart Ignition Switch OFF Flame Monitor Operation Switch Fan Motor Igniter 5 ...

Page 5: ...ilted lamp will blink Remedy Turn away form the direct sunlight Tighten all fittings and repeat start operation Replace a Nozzle or filter element Status Timing Possible causes During the operation During the operation Nozzle or filter element is clogged At the start of the operation The heater stays on slope Remove the causes of overheat Replace a nozzle or filter During the operation Power suppl...

Page 6: ... the voltage of power source Operation is normal but the low voltage lamp is lit Less than 90 of standard voltage is detected Check the voltage of power source Voltage depression Replace a fan motor Misfire 5 times in a row Description When the heater does not ignite with five 5 consecutive tries four 4 lamps will blink Loose fitting in fuel line Start procedure is fail with five 5 consecutive tri...

Page 7: ...andard Voltage input board Black Black fine Transformer AC 120V CN 10 ＣＮ 15 AC 230V AC 15V Solenoid pump CN 14 Ignition transformer AC 120V AC 230V approx 380Ω Chart１ Chart２ Fan motor ＣＮ 15 ＣＮ12 ＣＮ 10 0Ω CN 16 1 2 PIN 19 5kΩ 24kΩ Ω under DC1 2V approx DC5V 2kΩ 1kΩ 8 9kΩ approx a few MΩ Condition Resistance White White Red Red Ω 0Ω Ω 0Ω Red Red Ω Tip over switch Changeover switch White White 3 4 PI...

Page 8: ...l pump 42 46 Fuel pump is idling with clicking sound 47 48 Fuel is not sprayed normally from the nozzle 49 55 Misfire lamp is lit within about 15 seconds after switching on 56 62 Overheat lamp blinks during operation in any time 63 Tip over lamp blinks during operation in any time 64 65 Overvoltage lamp lights during operation Low voltage detection is working 66 67 Combustion is not stable 68 Smok...

Page 9: ... SA1 If the fuse is intact the transformer is short circuited Disconnect transformer connector CN 10 from burner control board then put plug into AC outlet Surge absorber SA1 on burner control is short circuited Replace a fan motor If the fuse is intact the fan coil is short circuited Unplug fan motor connector CN 15 and then start operation Fan motor is short circuited Disconnect fan motor connec...

Page 10: ...e resistance between terminals If the fuse is intact the ignition coils is short circuited Disconnect ignition transformer connector CN 12 and then start operation Disconnect ignition transformer cord from electrode then measure its resistance If it shows 0Ω the coil of ignition transformer is short circuited Cord color Standard value black black fine few M Ω Replace an ignition transformer If it ...

Page 11: ...voltage Cord color Standard value If it works normally thermostat connector fails on contact 18 Replace a transformer Disconnect transformer connector CN 10 from burner control then measure resistance If it shows Ω the transformer cord is disconnection If it works normally operation switch connector fails on contact Cord color Standard value Power source connector is loose connection Transformer c...

Page 12: ... is disconnection Overheat protection is defective 21 Not applicable in above Overvoltage lamp is lit Overvoltage detection is working If excessive voltage is detected over 300V for EPX1 over 150V for EPX5 in AC outlet overvoltage detection is working Plug into a working outlet Excessive voltage is detected Measure voltage of AC outlet Standard EPX1 AC230V EPX5 AC120V 28 Replace a tip over switch ...

Page 13: ...it board Burner control is defective Fuel pump connector CN14 is loose connection Plug connector CN14 firmly Measure voltage at terminal for fuel pump connector CN14 on burner control Cord color blue blue Standard value EPX1 AC 120 180V EPX5 AC 60 96V Replace a fuel pump If it shows AC 120 180V 60 96V the pump is defective Cord color Standard value Remove an obstacle in fan motor or replace a fan ...

Page 14: ...Repeat start operation 2 or 3 times in order to pump air out of fuel line NEVER repeat more than 5 times in a row as fire may result Measure voltage at photo cell connector CN9 with the connector on burner control Condition Standard value in dark approx DC 5V in light less than DC 1 2V Replace a fuel pump Cord color Standard value 44 Fuel pump is inhaling air If the heater is brand new or after re...

Page 15: ... seconds after switching on Combustion stops during the operation Replace a fuel pump Clean and flush the tank with kerosene alcohol or acetone If no fuel is pump up or fuel is not flowing at least 2 high the fuel pump is clogged or defective see exhibit How to restore the fuel flow How to check the fuel pump Nozzle is clogged Replace a nozzle Clean and flush the tank with kerosene alcohol or acet...

Page 16: ...ormally flame monitor connector fails on contact Plug flame monitor connector CN 9 again and then turn on Flame monitor connector CN 9 is loose connection 58 Poor lighting is detected by flame monitor Remove a burner and check whether the whirl vane and inside of draft tube are clear or not If they are dirty or dustiness flame monitor cannot detect flame light properly Clean the whirl vane and ins...

Page 17: ... fuel viscosity 69 Nozzle is clogged Replace a nozzle Clean and flush the tank with kerosene alcohol or acetone 70 Loose fitting in fuel line Confirm no loose fitting between fuel tank and fuel pump If any loose fitting exist fuel pump suck the air Tighten all fittings and repeat start operation 68 Smoke comes out Smoke is continuous for about 3 minutes or heater produces WHITE smoke Fuel viscosit...

Page 18: ...orrect Replace a changeover switch Changeover switch cord is disconnection Changeover switch is defective If it shows 0V the burner control is defective If it shows standard voltage AC 230V EPX1 AC 120V EPX5 the fuel pump is defective 75 74 If it shows 0Ω the fuel pump coil is short circuited 78 79 Solenoid valve cord is disconnection Solenoid valve is defective Measure voltage at 1 3 PIN terminal...

Page 19: ...stor Internal thermostat cable is defective Plug connector CN 17 firmly Disconnect adjustable resistor connector CN 16 from burner control then measure coil resistance values Standard value on each scale Ext thermo 0Ω Scale 3 1kΩ Cont 2kΩ Plug thermistor connector CN 17 again If it works normally thermistor connector fails on contact If it shows Ω or considerably abnormal value the adjustable resi...

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