Carrier 40MBDAQ - Page 24

40MBDAQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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4. Outdoor DC Fan IPM Board (for some double fan models)
Power on and when the unit is in the STANDBY mode, measure the voltage of CON1, pin1-pin2 and pin3-pin2 of CN1 in the DC motor
driver board. If the voltage value is not in the range (see Table 10), the outdoor main PCB has an issue and needs to be replaced.
Table 10 — Signals
CN1 Communication with the Main PCB (CONT)
PORT DESCRIPTION PARAMETER REMARK
CON1 Power input for the PCB 192-380V/DC
CN1 Communication with main PCB DC
CN2 Test Port 5V/DC For debugging board
FAN1 UVW output for DC fan motor
FAN2 UVW output for DC fan motor
NO SIGNAL VOLTAGE
1 Vcc 13.5-16.5V
2GND0V
3 VSP 0~6V
4 FG 13.5-16.5V
5 ---- ---
FAN2
CN1
C
N
C
C
1
CON1
C
O
N
1
FAN1
IPM for DC
Fan
EEPROM
EE
P
E
E
R
O
Drive Chip
v
e
C
h
C
C
CN2
C
N
CC
2
N
N
RecƟĮer
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