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[
II
Restrictions ]
SW4-7:OFF (Compressor ON/OFF, NIGHT MODE)
SW4-7:ON (STEP DEMAND)
Example of wiring connection
CN3D 1-3P
Compressor ON/OFF
CN3D 1-2P
NIGHT MODE
Open
OFF
Open
OFF
Short-circuit
ON
Short-circuit
ON
CN3D 1-2P
Open
Short-circuit
CN3D 1-3P
Open
100% (not on the
on-DEMAND control)
75%
Short-circuit
0%
50%
If the step listed as the wrong example above is taken, thermo may go off.
The percentage of the demand listed in the table above is an approximate value based on the
compressor volume and does not necessarily correspond with the capacity.
(Wrong)
(Correct)
100%
100%
0%
75%
50%
50%
Demand control
steps
Note the following steps to be taken when using the STEP DEMAND
(Example) When switching from 100% to 50%
CN51
Remote controller board
Controller board on
outdoor unit
Relay circuit
CN51
X
Y
X
Y
5
4
3
1
2
3
Maximum allowable wiring length = 10 m
L1 : Error indicator lamp/freeze prevention output
L2 : Compressor operation display lamp
X,Y : Relay (For 12V DC coil rating 0.9 W or below)
L
1
L
2
Field-installed
CN3D
Remote controller board
Controller board on
outdoor unit
Relay circuit
CN3D
X
Y
X
Y
Maximum allowable wiring length = 10 m
SW1 : NIGHT MODE command or Compressor ON/OFF
SW2 : Compressor ON/OFF command
X,Y : Relay (Contact Minimum applied load 12V DC 1 mA)
SW1
SW2
Field-installed
Lamp power supply
CN3S
Snow sensor
Controller board on
outdoor unit
X
CN3S
Maximum allowable wiring length = 10 m
X: Snow sensor (Contact Minimum applied load 12V DC 1 mA)
Insulation
Field-installed
1
2
3
Содержание PUHY-P168
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Страница 126: ... 117 VI Refrigerant Circuit 1 Refrigerant Circuit Figure 119 2 Principal Parts and Functions 126 ...
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Страница 134: ... 125 VI Refrigerant Circuit 3 CMB P104 and P108NU GB sub TH25 TH22 LEV3a CP Solenoid valves Block Check valves Block ...
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Страница 366: ... 357 IX Troubleshooting ...
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Страница 368: ... 359 X LED monitor display on the outdoor unit board 1 How to read the LED on the service monitor 361 ...
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