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8
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5. Basic circuit diagram
Circuit board diagram and check points
* Fan drive output voltage: Each 220 to 240 V AC
During
operation: 0
Ω
When
stopped:
Ω
(TM4 9,10)
5 V DC
(C6)
GND
(C5)
(TAB3)
LED 4 (Red)
•
Energized: Lit
•
Not
energized: OFF
(TAB1, TAB2)
12 V DC
(C4,C5)
15 V DC
(C3,C8)
LED 1 (Green)
•
Normal : unlit
•
During
an error: blinking
(TAB5)
EA fan drive
(CN9)
Extra
High High
Low
Transformer
secondary
(CN2)
(output)
11 to 20 V AC
Lossnay remote controller
(PZ-60DR-E, PZ-41SLB-E)
and transmission cable
between Lossnay units
(TM4 , )
10 to 15V DC
Transformer
primary (input)
(CN1)
220 to 240 V AC
Fuse
(5 A/250 V)
For damper
motor drive
(CN7)
220 to
240 V AC
During an
error : 0
Ω
Normal:
Ω
(TM3 7,8)
When SW5-6 is OFF
During bypass
ventilation: 0
Ω
During Lossnay
ventilation:
Ω
When SW5-6 is ON
During operation
and when the outdoor air
temperature is -5°C to
15°C: 0
Ω
While the unit is stopped,
or when the outdoor air
temperature is 15°C:
Ω
(TM3 6,7)
Thermistor
(RA) (OA)
(CN5)
LED 2 (Red)
When it is blinking, an
M-NET communication
error is occured.
(The number of
blinks indicates the
details of the error)
It will be lit steadily
when there is no
(registered) connection
to another M-NET
device.
M-NET transmission
cable (Shielded)
(TB5 S)
For external
device connections
(TM2)
M-NET transmission cable
(PZ-52SF-E, M-NET
controller, power supply
unit, and City Multi
indoor unit)
(TB5 A,B)
Damper motor
position detection
(CN6)
During Lossnay
ventilation: 12 V DC
During Bypass
ventilation: 0 V
SA fan drive
(CN10)
Extra
High High
Low
Common for EA
fan drive
Common for SA
fan drive
Power supply
230 V AC
