Application Control P.c.board (Pre-Installed) - Toshiba MMD-AP0726HP-UL Service Manual

8-6. Application control P.C.Board (pre-installed)

Application control P.C.Board is pre-installed for Secondary Heating output and another functions.
<Location of Application control P.C.Board>
FAN control PC board CN505(RED)
Screw B
CN1
(RED)
Screw A
Application control P.C.Board
Nomenclature and functions
3 4
1
2
TB2
IN3 IN2 IN1 COM
1
External analog input terminal (TB3)
Changes air flow, operating mode, and temperature settings depending on
resistance value from 0 to 140 Ω.
Do not apply voltage or current to this terminal.
2
External digital input terminal (TB2)
Connect for external trouble input or prohibition of local input.
3
External digital input
Switch for voltage ON (WET) and voltage OFF (DRY)
(Factory default: Voltage OFF (DRY))
4
Switch for setting signal output
(Factory default: 0)
Adjust to signal that you want to extract and set the switch.
5
Connector for connecting to indoor circuit board (CN1)
Indoor unit side: Red (CN505). On this control P.C.Board Red (CN1).
6
Switch for function select (SW4)
(Factory default: OFF)
Bit 1: Switches inversion of output logic of signal output 3 (OUT3)
Bit 2: Not used (do not set)
7
EXCT connector (CN4)
Can thermostat. OFF by shorting this connector.
8
Signal output terminal block (TB1)
Connect when extracting output signal.
Connector assembly
Control circuit board
* Remove the clamp filter.
Put extra wires into the cord clamp.
Cord clamp
Terminal block assembly
Card edge specer, 3pcs
5 6
0
SW4
8
0
K1
K3 K2
8
0
8
OUT3 OUT2 OUT1
1 Take off the screws A and B then remove the
terminal block assembly.
2 To connect wiring to Signal output terminal:
TB1 or External digital input terminal ;
TB2 or External analog input terminal;
TB3 according application.
*For the field wiring, insert it into the grommet for
insert the control wires, and pass it through the
hole for wiring of the terminal block assembly, and
connect it to the application control P.C.Board on
the back.
3 Return the terminal block assembly to the original
position without pinching wires.
Confirm to hook the claw of terminal block assembly
Fixing claw for terminal block
on the right side.
Then fix screw A and B.
Grommet for insert
control wires
Hole for wiring
<Signal output terminal: TB1>
The following signal outputs are extracted from "OUT1", "OUT2", and "OUT3".
It is possible to change the signal outputs with SW1, SW2, and SW3.
* Always turn off the power to the indoor unit before setting the signal
outputs.
Note that even if you set the signal outputs, the settings do not
change if the power to the indoor unit is ON.
7
SW1
K1
SW2
K2
TB1
SW3
K3
8
SW1, 2, and 3 settings
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
DN [DC] : "0000" : Cool dry output
*1
DN [DC] : "0001" : Secondary heating output
*2 Only signal output 3 (OUT3) can change relay (K3) contacts from A contact to B
contact by switching the relay output reverse switch (SW4(bit 1)) from OFF to ON.
• A contact: Relay is ON when there is signal output
• B contact: Relay is OFF when there is signal output
Always turn off the power to the air conditioner before doing the settings because
the SW4 settings also are not changed even if the settings are changed while the
power is ON.
- 46 -
TB1
External
equipment
External
equipment
External
equipment
*Maximum wiring length is 1640' (500m)
Signal output
No output (default)
Cool dry output or Secondary heating output *1
Heat output
Defrost output
Fan output (indoor unit fan ON)
Thermostat. ON output
Ventilation output
Operation output
Alarm output
-
Heater output
Actual compressor on output
Actual fan status output
Filter sign output
Demand response output
Not sed u
(Relay is ON when there is no signal output)
<Connectable load>
30 VDC/1 A or less