Frontier LP7700 - Page 409

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4. Troubleshooting
4203
4203
Diagnosis appendix for the failures: Symptom due to the connection failure of wiring
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! Processor power supply 2 (PS2)
!
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! Drive motor driver PCB
*1
*1. The drive motor driver PCB is installed only in the QSS-3704, QSS-3705, LP7700 and LP7900.
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! Circuit breaker (NFB1)
!
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! Earth leakage circuit breaker (NFB2)
Connector No. Symptom
J/P793 Power supply from the
processor relay PCB
The following error message is shown.
• No.05508-00000 The processing solution level is too low. occurs.
• No.05510-00000 Processor A/D conversion error. occurs.
• No.05519-00000 Thermosensor error. CD occurs.
• No.05520-00000 Thermosensor error. BF occurs.
• No.05521-00000 Thermosensor error. STB occurs.
• No.05522-00000 Dryer Thermosensor error. occurs.
• No.05532-00000 The Processing Solution Safety Thermostat has activated. occurs.
• No.05533-00000 The Dryer Safety Thermostat has activated. occurs.
The following attention message is shown.
• No.00503-00000 Empty the Effluent Tank. occurs.
J/P794 Power supply (+24 V) to the
processor control PCB and
the processor I/O PCB 1.
Supplies the power to the
processor relay PCB (+24 V).
The following error message is shown.
• No.06903-00002 Serial communication error. occurs.
• No.05510-00000 Processor A/D conversion error. occurs.
• No.05508-00000 The processing solution level is too low. occurs.
• No.05532-00000 The Processing Solution Safety Thermostat has activated. occurs.
• No.05533-00000 The Dryer Safety Thermostat has activated. occurs.
The following attention message is shown.
• No.00500-00000 Add water to the Refilling Water Tank. occurs.
• No.00503-00000 Empty the Effluent Tank. occurs.
J/P795 Power supply (GND) to the
processor control PCB and
the processor I/O PCB 1.
Supplies the power to the
processor relay PCB (GND)
The following error message is shown.
• No.06903-00002 Serial communication error. occurs.
The following attention message is shown.
• No.00503-00000 Empty the Effluent Tank. occurs.
Connector No. Symptom
CN1
(J/P770)
Power supply from the
processor relay PCB
No.05550-00000 Drive Motor has stopped. occurs.
CN2
(J/P771)
Power supply from the
processor control PCB.
CN3
(J/P780)
Power supply to the drive
motor.
The following symptom occurs.
• No.05550-00000 Drive Motor has stopped. occurs.
• LED1 of the drive motor driver PCB blinks three times.
CN4
(J/P767)
Connector No. Symptom
Power supply from TA2 to TA3 All the systems do not start.
Connector No. Symptom
Power supply from TA2 to TA3 No error occurs under this condition. (The power supply to the dry heater turns to off.)
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