Mitsubishi Heavy Industries KXZ Series User Manual

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194
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'21 • KX-T-380
8.5 Outdoor unit power PCB exchange procedure
Exchange the Power PCB (Fig.1) according to the following procedure.
1. Exchang
e the PCB
after elapsing 3 minutes from power OFF
. (Even after the breaker
have been turned off, some capacitors still hold high voltage. This condition is very
dangerous to touch PCB.) Be sure that the voltage (DC) is under 30 V before harnesses
disconnect from PCBs. (Refer to Fig.2.)
2. Remove the connectors from the former Power PCB and then exchange to the new PCB.
3.
Reconnect the connectors as before. ( Be sure that there are not half inserted connectors .)
Precautions for Safety
• Since the following precaution is the important contents for safety, be sure to observe them.
WARNING and CAUTION are described as follows:
Indicates an imminently hazardous situation which will result in death or serious injury if
proper safety procedures and instructions are not adhered to.
Indicates a potentially hazardous situation which may result in minor or moderate injury if
proper safety procedures and instructions are not adhered to.
WARNING
• Securely exchange the PCB according to this procedure.
If the PCB is incorrectly exchanged, it will cause an electric shock or re.
• Be sure to check that the power source for the outdoor unit is turned OFF before exchanging the PCB. The PCB
exchange under current-carrying will cause an electric shock or re.
• After nishing the PCB exchange, check that wiring is correctly connected with the PCB before power
distribution. If the PCB is incorrectly exchanged, it will cause an electric shock or re.
CAUTION
• Band the wiring so as not to tense because it will cause an electric shock.
WARNING
CAUTION
PCB012D106
Fig.1 Parts arrangement
Fig.2 PCB mounting position and voltage measurement points
Be sure that the voltage (DC) is under 30 V
Power PCB
Control PCB
Parts No.
CNM3
CNM1
CNE2
CNM2
CNK4
After elapsing 3 minutes
from power OFF
CNZ1 CNH CNY
CNR2
CNN2
CNN16
CNN4
CNN5
CNN3
CNN13
CNN10
CNK4
CNA3
CNA1
CNQ1
CNQ2
CNQ3
CNK2
CNFAN2
CNFAN1
CNK4
CNW
CNE5
CNN8 CNN11
CNN9 CNN7
CNN1
CNR1
CNN6 CNN14
*Presence and shape
of electric component
may vary according to
model.
Voltage (DC) measurement points
: J101 and J102 on the Power PCB
Never plug connectors
in half inserted

Mitsubishi Heavy Industries KXZ Series Specifications

General

Brand	Mitsubishi Heavy Industries
Model	KXZ Series
Category	Air Conditioner
Language	English