Instruction Of How To Replace Pcb - Mitsubishi FDK15KXZE1 Technical Manual

10.3 Instruction of how to replace PCB

(1) FDK15-56KXZE1
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Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself.
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The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION. The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION.
Both mentions the important items to protect your health and safety so strictly follow them by any means. Both mentions the important items to protect your health and safety so strictly follow them by any means.
WARNING WARNING Wrong installation would cause serious consequences such as injuries or death. Wrong installation would cause serious consequences such as injuries or death.
CAUTION CAUTION Wrong installation might cause serious consequences depending on circumstances. Wrong installation might cause serious consequences depending on circumstances.
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After completing the replacement, do commissioning to confirm there are no abnormalities. After completing the replacement, do commissioning to confirm there are no abnormalities.
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Replacement should be performed by the specialist. Replacement should be performed by the specialist.
If you replace the PCB by yourself, it may lead to serious trouble such as electric shock or fire. If you replace the PCB by yourself, it may lead to serious trouble such as electric shock or fire.
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Replace the PCB correctly according to these instructions. Replace the PCB correctly according to these instructions.
Improper replacement may cause electric shock or fire. Improper replacement may cause electric shock or fire.
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Shut off the power before electrical wiring work.Start the work after elapsing 1 minutes or more from power off. Shut off the power before electrical wiring work.Start the work after elapsing 1 minutes or more from power off.
Replacement during the applying the current would cause the electric shock, unit failure or improper running. Replacement during the applying the current would cause the electric shock, unit failure or improper running.
It would cause the damage of connected equipment such as fan motor,etc. It would cause the damage of connected equipment such as fan motor,etc.
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Fasten the wiring to the terminal securely, and hold the cable securely so as not to apply unexpected stress on the terminal. Fasten the wiring to the terminal securely, and hold the cable securely so as not to apply unexpected stress on the terminal.
Loose connections or hold could result in abnormal heat generation or fire. Loose connections or hold could result in abnormal heat generation or fire.
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Check the connection of wiring to PCB correctly before turning on the power, after replacement. Check the connection of wiring to PCB correctly before turning on the power, after replacement.
Defectiveness of replacement may cause electric shock or fire. Defectiveness of replacement may cause electric shock or fire.
CAUTION CAUTION
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In connecting connector onto the PCB, connect not to deform the PCB. It may cause breakage or malfunction. In connecting connector onto the PCB, connect not to deform the PCB. It may cause breakage or malfunction.
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Insert connector securely, and hook stopper. It may cause fire or improper running. Insert connector securely, and hook stopper. It may cause fire or improper running.
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Bundle the cables together so as not to be pinched or be tensioned. It may cause malfunction or electric shock for disconnection or deformation. Bundle the cables together so as not to be pinched or be tensioned. It may cause malfunction or electric shock for disconnection or deformation.
Exchange the PCB according to the following procedure. Exchange the PCB according to the following procedure.
1. Remove the air inlet panel. 1. Remove the air inlet panel.
2. Remove the 2 screws in the cap of bottom panel. 2. Remove the 2 screws in the cap of bottom panel.
3. Remove the 2 hooks of left and right side and then bottom panel can be removed. 3. Remove the 2 hooks of left and right side and then bottom panel can be removed.
4. Remove the screws. (2 screws) 4. Remove the screws. (2 screws)
5. Remove the upper latches and then front panel can be removed.(4 latches) 5. Remove the upper latches and then front panel can be removed.(4 latches)
6. Remove the screw and control cover. 6. Remove the screw and control cover.
Front panel Front panel Air inlet panel Air inlet panel
Screw Screw
Bottom panel Bottom panel
Screw (in the cap) Screw (in the cap)
7. Replace the PCB only after all the wirings connected to the connector are removed. 7. Replace the PCB only after all the wirings connected to the connector are removed.
8. Fix the board such that it will not pinch any of the wires. 8. Fix the board such that it will not pinch any of the wires.
9. Switch setting must be same setting as that of the removed PCB. 9. Switch setting must be same setting as that of the removed PCB.
10. Reconnect the wirings to the PCB. Wiring connector color should match with the color of connector of the PCB. 10. Reconnect the wirings to the PCB. Wiring connector color should match with the color of connector of the PCB.
Parts mounting are different by the kind of PCB. Parts mounting are different by the kind of PCB.
CNF (Yellow) CNF (Yellow)
CNB (Green) CNB (Green)
CNT (Blue) CNT (Blue)
CNJ1 (White) CNJ1 (White)
SW7 SW7
SW5 SW5
SW6 SW6
CNQ (Red) CNQ (Red)
CNI (Blue) CNI (Blue)
CNR (White) CNR (White)
SAFETY PRECAUTIONS SAFETY PRECAUTIONS
WARNING WARNING
Latch Latch
CNH (Black) CNH (Black) CNK1 (White) CNK1 (White)
CNC (White) CNC (White) CNK2 (Black) CNK2 (Black)
SW1 SW1
SW2 SW2
CNL (Black) CNL (Black) CNT2 (Red) CNT2 (Red)
PHA012D050AA
Screw Screw
CNN (Yellow) CNN (Yellow) CNP (Green)
CNW3 (White) CNW3 (White)
CNA (Red) CNA (Red)
SW3 SW3
SW4 SW4
Part number Part number
CNTA (Blue) CNTA (Blue) CNM1 (White) CNM1 (White)
□□ □□
037 037
105
– –
'17 • KX-T-264
Control cover Control cover
CNW0 (White) CNW0 (White)