Circuit Board Diagrams - Mitsubishi Electric Lossnay VL-220CZGV-EB Handbook

6. Circuit board diagrams

Circuit board diagram and check points
( 1 ) Control circuit board
Malfunction monitor output
(Between 8 and 0)
Error: 0
Normal:
Operation monitor output
(Between 9 and 0)
When Lossnay is operating: 0
When Lossnay is stopped:
Monitor output
COM
Remote controller
(PZ-61DR-E, etc.)
10 to 13 V DC
External control input
Power circuit board
12 to 14 V DC
(Insulated)
5 V DC (Insulated)
Power for the circuit
GND
(Insulated)
Bypass monitor output
Pre-heater output
(Between 7 and 0)
During bypass mode: 0
During heat recovery mode:
Outdoor air (OA)
Power supply indicator
thermistor
for the circuit
(LED4 Red)
Fed with power: lit
Not fed with power: unlit
Remote controller
power supply indicator
(LED3 Green)
Fed with power: lit
Not fed with power: unlit
10s digit 1s digit
SW6
Air duct switching damper selector
(Only when the air duct
switching damper (P-133DUE-E)
is installed)
─ 10 ─
Lot number indication
Indication of the
microcomputer
software version
SW2
SW5
Function selection
switch
Error indicator
(LED1 Green)
Normal: unlit
Error: blinking
During delay operation: lit