Fan Board - Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook

[4-2 Outdoor Unit Circuit Board Components ]
4-2-4

Fan Board

RSH03
Current detection resistor
RSH02
Current detection resistor
RSH01
Current detection resistor
CNINV
Inverter output
W
V
U
CNDCP
Bus voltage input (P)
1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.
Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that
the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less. It takes about 10 minutes to discharge electricity
after the power supply is turned off.
2) Control box houses high temperature parts. Be well careful even after turning off the power source.
3) Perform the service after disconnecting the relay connector (RYFAN1, RYFAN2). Before plugging in or unplugging
connectors, check that the outdoor unit fan is not rotating and that the voltage across pins 1 and 5 of connector
RYPN is 20 VDC or less. The capacitor may collect a charge and cause an electric shock when the outdoor unit fan
rotates in windy conditions. Refer to the wiring nameplate for details.
4) To connect wiring to TB7, check that the voltage is 20 VDC or below.
5) After servicing, reconnect the relay connector (RYFAN1, RYFAN2) of the fan as it was.
12 -
chapter 4
CNDCP
Bus voltage input (N)
DIP IPM (rear)
F001
10 A 400 V fuse
LED01
Lit: Inverter operation
Blinking: Inverter error
LED04
Lit: Microcomputer in operation
CN81
17 VDC input
GND
SW001
ON: No-load operation
OFF: Normal operation
OFF: Fixed
Address switch
Address switch
CN80
Serial communication signal input
GND (Control board)
Serial communication signal output
GND (Control board)
BS_04_E