Voltage Test Points On The Control Board - Mitsubishi Electric PEFY-P20VMS-E Technical & Service Manual

[ VII Troubleshooting ]

4. Voltage test points on the control board

1. PEFY-P20, 25, 32, 40, 50, 63VMS-E
Fuse
CND
С25(*1)
CN2M
SWE
SW2
SW4
CN42
SW3
CN81
CN32
LED2 CN3A
CNP
CNMF
C951(*1)
PC941(*1)
LED1
CN3C
CN20
CN4F
CN44
CN41
CN51
CN52
CN60
- 17 -
CND Power supply voltage (220 - 240VAC)
CN2M For M-NET transmission cable con-
nection (24 - 30VDC)
SWE Emergency operation
SW2 Capacity setting
SW4 Function setting
CN42 For address board connection
SW3 Function setting
CN81 For address board connection
CN32 Remote start/stop adapter
CN3A For MA remote controller cable con-
nection
(10 - 13 VDC (Between 1 and 3.))
CN52 Remote display
CN51 Centralized control
CN41 JAMA standard HA terminal A
CN44 Thermistor (liquid/gas temperature)
CN4F Float thermistor
CN20 Thermistor (Inlet temperature)
CN3C Indoor-outdoor transmission
(0 - 24VDC)
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)
(*1)
V Voltage on the (-) side of PC941 and
FG
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 C951 pins
0VDC (with the fan stopped)
1 - 6.5VDC (with the fan in operation)
(Same with the voltage between 6 (+)
and 4 (-) of CNMF)