Voltage Test Points On The Control Board - Mitsubishi Electric CITY MULTI PEFY-W20VMA-A Technical & Service Manual

[ VII Troubleshooting ]

4. Voltage test points on the control board

1. PEFY-W20, 25, 32, 40, 50, 63, 71, 80, 100, 125VMA(L)(2)-A
CN52
CN51
CN8A
CN41
CN3A
CNSA
CNSB
HWE18200
CN2M
CN44 CN20
CN4F PC352 C084
(-) side (-) side
CNP CND F01
CNMF SWE
C351
- 29 -
F01 Fuse (AC 250V 6.3A)
CND Power supply voltage (220 -
240VAC)
CN2M For M-NET transmission cable
connection (24 - 30VDC)
SWE Emergency operation
CN32 Remote start/stop adapter
CN3A For MA remote controller cable
connection
(10 - 13 VDC (Between 1 and 3.))
CN52 Remote display
CN51 Centralized control
CN41 JAMA standard HA terminal A
CN44 Thermistor (water inlet / water
outlet temperature)
CN4F Float switch
CN20 Thermistor (Inlet temperature)
CNMF Fan motor output
1 - 4: 310 - 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)
CNP Drain-up mechanism output
(200VAC)
CNSA Pressure sensor (inner water)
CNSB Pressure sensor (outlet water)
CN8A Flow control valve (FCV)
(*1)
V Voltage on the (-) side of PC51
FG
and C25
(Same with the voltage between 7
(+) and 4 (-) of CNMF)
V Voltage between the C25 pins
CC
15 VDC
(Same with the voltage between 5
(+) and 4 (-) of CNMF)
Vsp Voltage between the C53 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