Voltage Test Points On The Control Board - Mitsubishi Electric CITY MULTI PFFY-P20VCM-E Technical & Service Manual

[ VII Troubleshooting ]

4. Voltage test points on the control board

1. PFFY-P20, 25, 32, 40, 50, 63VCM-E
F1
CND
SWE
CN2M
CN32
SW1 SW2
SW4
HWE18160
SW3
CN52 CN51
SW21 SW22
CNMF1
CN44
CN22
CN20
CN3A
CN41
- 20 -
F1 Fuse (AC 250V 6.3A)
CND Power supply voltage (220 -
240VAC)
CN2M For M-NET transmission cable
connection (24 - 30VDC)
SWE Emergency operation
SW2 Capacity setting
SW4 Function setting
SW3 Function setting
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 (liquid/gas tempera-
ture)
CN20 Thermistor (Inlet temperature)
CNMF1 Fan motor output
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)
(*1)
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