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108
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'14 • KX-T-222
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114
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'14 • KX-T-222
SAFETY PRECAUTIONS
WARNING
CAUTION
WARNING
CAUTION
PSC012D036
● Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself.
● 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.
Wrong installation would cause serious consequences such as injuries or death.
Wrong installation might cause serious consequences depending on circumstances.
● After completing the replacement, do commissioning to confirm there are no abnormalities.
● 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.
● Replace the PCB correctly according to these instructions.
Improper replacement may cause electric shock or fire.
● 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.
It would cause the damage of connected equipment such as fan motor,etc.
● 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.
● Check the connection of wiring to PCB correctly before turning on the power, after replacement.
Defectiveness of replacement may cause electric shock or fire.
● In connecting connector onto the PCB, connect not to deform the PCB. It may cause breakage or malfunction.
● Insert connector securely, and hook stopper. It may cause fire or improper running.
● Bundle the cables together so as not to be pinched or be tensioned. It may cause malfunction or electric shock for disconnection
or deformation.
(1) Replace the PCB
(2) Fan motor control PCB
Parts mounting are different by the kind of PCB.
Models : FDU224KXZE1, 280KXZE1
FDU1800FKXZE1, 2400FKXZE1
1. Take off the connection of connector and remove the screw of power transistor then remove the PCB.
Wipe off the silicon grease neatly on the controller’s radiation heat fins.
2. Before installing the power transistor on the new PCB,
apply uniformly a bundled of silicon grease
first on the surface of power transistor.
Make sure it is applied to prevent
damage on power transistor
, and install the PCB not to pinch the wirings.
3. Tighten the screw of power transistor and reconnect the wirings to the PCB.
Confirm the connection and don’t use soldering in the connection.
Power transistor can be damage
if not properly tighten. (Recommended power transistor tightening torque:0.59
〜
0.78N
･
m)
Tighten properly the power transistor with a screw and make sure there is no slack.
P
art number
PJ
A
505
A
250
□□
C
N
M (
White)
M
otor power
C
NF
M (
White)
Fan motor
(3) Fan motor control PCB
