Jeio tech OV-11 Manual de usuario
Service Manual
(Model : OV-11 / 12)
작성일자 2008-3-31
개정일자 2008-3-31
개정번호 Rev.(0)
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INDEX
1. Service
1-1. Temperature
- Temp doesn’t increase
- Temp trembling
- Variation Cause
- Temp keeps rising
1-2. Power
- No Power
- Power shut off during operation
- Power shut off after turning on
1-3. DISPLAY
- Push button error
- Display error
1-4. Door
- Can’t close door
1-5. Current leakage.
- Current breaker active.
1-6. Communication
- Can’t connect.
1-7. Vacuum
- How to check vacuum leaking point.
- Can’t get vacuum status.
- Vacuum leakage.
2. Disassembly and Inspection
2-1. Disassembly
2-1-1. Side Cover panel disassembly.
2-1-2. Door packing disassembly.
2-1-3. Main board PCB disassembly.
2-1-4. SSR disassembly.
2-1-5. Relay disassembly.
2-1-6. Noise Filter disassembly.
2-1-7. 3 way valve disassembly.
2-1-8. Heater disassembly.
2-1-9. Display PCB disassembly.
2-1-10. Temperature control Sensor disassembly.
2-1-11. High Temp Limit Sensor disassembly.
2-1-12. Keeper disassembly.
2-1-13. Communication Board disassembly.
2-2. Inspection
2-2-1. Main Board Relay output Inspection.
2-2-2. Main Board Heater output Inspection.
2-2-3. Main Board AC input Power Inspection.
2-2-4. Heater short circuit Inspection.
2-2-5. Heater leakage Inspection.
2-2-6. Noise Filter error Inspection.
2-2-7. Main Power Switch error Inspection.
2-2-8. SSR error Inspection.
2-2-9. Wire snaps Inspection.
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1. Service
1-1. Temperature
Classification Symptom Service Factor
Temperature Temp doesn’t increase Heater Malfunction
Check point
1. After setting 100℃ then press Start Button to operate the unit.
2. Check the Heater temp itself. (Be careful heater is very hot.)
3. Measure resistance checking positive terminal of heater using of the multi meter.
Æ If resistance doesn’t measure, it is a malfunction
Solution
- Replace a heater.
1. “2-1-8. Heater disassembly” Reference
(When replacing a Heater, Inner Chamber Jacket, Chamber Disassembly are very complicated, Do not replace the heater in the field.)
2. The assembly is reverse order of disjointing.(Heater should be checked resistance for inferiority.)
Classification Symptom Service Factor
Temperature Temp doesn’t increase Relay Malfunction
Check point
1. 1. Press the Start Button to operate the unit, Measure Voltage of Output terminal using of the
multi meter.
Æ If Voltage doesn’t measure, it is a malfunction
Solution - Replace the Relay.
- 4 -
1. “2-1-1. Side Cover panel disassembly” Reference
2. “2-1-5. Relay disassembly” Reference
3. The assembly is reverse order of disjointing.
Classification Symptom Service Factor
Temperature Temp doesn’t increase SSR Malfunction
Check point
1. Set the SV value higher than PV, Press the Start Button.
2. Check the HEAT LED is lightning on Display. (No Flickering, Lightning)
3. Check Terminal Resistance using of the Multi meter. (Resistance MODE)
Æ If resistance doesn’t measure, it is a malfunction.
Solution
- Replace the SSR.
1. “2-1-1. Side Cover panel disassembly” Reference
2. “2-1-4. SSR disassembly” Reference
3. The assembly is reverse order of disjointing.
- 5 -
Classification Symptom Service Factor
Temperature Temp doesn’t increase PCB Malfunction
Check point
1. Set the SV value higher than PV, Press the Start Button.
2. Check the HEAT LED is lightning on Display. (No Flickering, Lightning)
3. Check Terminal Resistance using of the Multi meter. (DC MODE)
Æ If resistance doesn’t measure, it is a malfunction.
Solution
- Replace the PCB.
1. “2-1-1. Side Cover panel disassembly” Reference
2. “2-1-3. Main board PCB disassembly” Reference
3. The assembly is reverse order of disjointing.
- 6 -
Classification Symptom Service Factor
Temperature Temp doesn’t increase Wire from heating parts disconnection
Check point
1. Check the wire from Heater to SSR.
2. “2-2-9. Wiring disconnection ” Reference
Æ If resistance is not measured, it is disconnection.
3. Check the end terminal connection of the wire.
Æ If connection is not good, it is disconnection
Solution
- If it is disconnection, replace the wire.
1. “2-1-1. Side Cover panel disassembly” Reference
2. Replace the wire.
3. The assembly is reverse order of disjointing.
Classification Symptom Service Factor
Temperature Temp trembling Wrong PID Value
Check point
1. Press Temp button with turning on the Main power switch at the same time.
2. Press Auto tuning Button to check the PID value.
Æ If the unit PID value is different from a basis PID value, It’s error.
Solution
- Operate the Auto tuning.
1. Press Temp button to set the desired temp.
2. Press A/T button for a second, Auto Tune displayed on the temp display and A/T LED ON.
3. After pressing Start Button, RUN LED is ON. A/T LED flickers and then operates the Auto Tune.
4. Finishing Auto Tune, LED is off. The temp by Auto Tune keeps controlling temperature.
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Classification Symptom Service Factor
Temperature Temp trembling PCB Malfunction
Check point
1. Operate the Auto tuning.
Æ, If the temp is trembling after Auto tuning, It is PCB Malfunction
Solution
- Replace the PCB.
1. “2-1-1. Side Cover panel disassembly” Reference
2. “2-1-3. Main board PCB disassembly” Reference
3. The assembly is reverse order of disjointing.
- 8 -
Classification Symptom Service Factor
Temperature Temp trembling Temp Sensor connection inferiority
Check point
1. Check the temp sensor terminal bolts of PCB.
Æ If bolts are loosening, it causes disconnection inferiority.
Solution
- Tighten the temp sensor terminal bolts of PCB.
1. “2-1-1. Side Cover panel disassembly” Reference
2. Tighten the temp sensor terminal bolts of PCB.
3. The assembly is reverse order of disjointing.
Classification Symptom Service Factor
Temperature Variation Cause PCB Malfunction
Check point 1. Replace the PCB to check the situation.
Æ If Variation is not caused, it is PCB Malfunction.
Solution
- Replace the PCB.
1. “2-1-1. Side Cover panel disassembly” Reference
2. “2-1-3. Main board PCB disassembly” Reference
3. The assembly is reverse order of disjointing.
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Classification Symptom Service Factor
Temperature Variation Cause BIAS Value modification
Check point 1. Measure temp of the inner chamber using of A exterior temp detector installed in the middle.
Æ If displayed temp and the temp detector value are different, Modify BIAS Value..
Solution
- BIAS Value Modification -
1. Install A exterior temp detector verified inner chamber.
2. After setting the temp value, Wait for the temp that is stabilized.(About 2hours over)
3. Measure the temp detector installed inner chamber.
4. Press Temp Button six times to modify the Bias value.
5. Modify the BIAS value to set the temp is equal to the temp detector. And then press the ENTER Button to restore the value.
6. Modify the temp value.
Classification Symptom Service Factor
Temperature Variation Cause Measurement Inferiority
Check point 1. Check the temp detector position.
Æ If the temp detector is not in the middle position, It’s a malfunction.
Solution
- Measuring position change.
1. The sensor of temp detector positioned in the middle of inner chamber.
2. Fixture and the sensor of temp detector should be intervals minimum 15mm. (Standard Test Guide Reference)
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Classification Symptom Service Factor
Temperature Temp trembling Temp Sensor connection inferiority
Check point
1. Check the temp sensor terminal bolts of PCB.
Æ If bolts are loosen, it cause disconnection inferiority.
Solution
- Tighten the temp sensor terminal bolts of PCB.
1. “2-1-1. Side Cover panel disassembly” Reference
2. Tighten the temp sensor terminal bolts of PCB.
3. The assembly is reverse order of disjointing.
Classification Symptom Service Factor
Temperature Temp keeps rising PCB Malfunction
Check point 1. Replace the PCB to check the symptom.
Æ If Variation is not caused, it is PCB Malfunction.
Solution
- Replace the PCB.
1. “2-1-1. Side Cover panel disassembly” Reference
2. “2-1-3. Main board PCB disassembly” Reference
3. The assembly is reverse order of disjointing.
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