Voltage Test Points On The Control Board - Mitsubishi Electric CITY MULTI PFFY-W20VCM-A Technical & Service Manual

[ VII Troubleshooting ]

4. Voltage test points on the control board

1. PFFY-W20, 25, 32, 40, 50VCM-A
F1
CND
SWE
CN2M
CN32
SW1 SW2
SW4
HWE18170
SW3
CN52 CN51 CN41
SW21 SW22 CN8A
F1
CND
CN2M
SWE
SW2
SW4
SW3
CN32
CN3A
CN52
CNMF1
CN51
CN41
CN44
CN44
CN20
CN22
CNMF1 Fan motor output
CN20
CNSB
CNSA
CNSA
CNSB
CN3A
CN8A
(*1)
- 17 -
Fuse (AC 250V 6.3A)
Power supply voltage (220 -
240VAC)
For M-NET transmission cable
connection (24 - 30VDC)
Emergency operation
Capacity setting
Function setting
Function setting
Remote start/stop adapter
For MA remote controller cable
connection
(10 - 13 VDC (Between 1 and 3.))
Remote display
Centralized control
JAMA standard HA terminal A
Thermistor (water inlet/outlet tem-
perature)
Thermistor (Inlet air temperature)
1 - 4: 294 - 340 VDC
5 - 4: 15 VDC
6 - 4: 0 - 6.5 VDC
7 - 4: Stop 0 or 15 VDC
Run 7.5 VDC
(0 - 15 pulse)
Pressure sensor (inner water)
Pressure sensor (outlet water)
Flow control valve (FCV)
V Voltage on 3 of PC352 and the (-)
FG
side of C081
(Same with the voltage between 7
(+) and 4 (-) of CNMF)
V Voltage between the C084 pins
CC
15 VDC
(Same with the voltage between 5
(+) and 4 (-) of CNMF)
Vsp Voltage between the C351 pins
0VDC (with the fan stopped)
1 - 6.5VDC (with the fan in opera-
tion)
(Same with the voltage between 6
(+) and 4 (-) of CNMF)
GB