Voltage Test Points On The Control Board - Mitsubishi Electric CITY MULTI PVFY-P12NAMU-E Technical & Service Manual

[ VIII Troubleshooting ]

4. Voltage test points on the control board

1. PVFY-P12, 18, 24, 30, 36, 48, 54NAMU-E
CN2M
CN3A
CN24-2
CN24-1
SW2
SW4
CNEC2
CNEC1
C N X B 1
HWE1405A
CN32
SW3
Indoor controller board
CND F01
C N X C 1 C N X A 1 C N M F
C53
(*1)
PC51 C25
(*1)
(*1)
F01
CND
CN2M
SWE
SW2
CN41
SW4
CN51
SW3
CN52
CN32
CN20
CN3A
CN4F
CN52
CN44
CN22
CN51
SWE
CN41
CN44
CN7V
CN4F
CN22
CN24-1 For 1st heater control
CN24-2 For 2nd heater control
CN20
CNMF
CN7V
CNEC1 Connect to the indoor controller
CNEC2 FAN OUT
(*1)
V
FG
V
CC
Vsp Voltage between the C53 pins
- 28 -
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 (liquid/gas tempera-
ture)
Float sensor
For fan control
Thermistor (Inlet temperature)
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)
Connect to the indoor power
board
board
Voltage on the (-) side of PC51
and C25
(Same with the voltage between 7
(+) and 4 (-) of CNMF)
Voltage between the C25 pins
15 VDC
(Same with the voltage between 5
(+) and 4 (-) of CNMF)
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