Other Functions; Led Display - Toshiba MMD-AP0726HP-UL Service Manual

<External digital input terminal: TB2>
The following controls can be done by inputting signals to the external digital input
terminal.
▼ IN1: External trouble input
The air conditioner system stops and check code "L30: Indoor unit external interlock
trouble" is displayed on the wired remote control when an external trouble is input.
▼ IN2: Prohibition of local input
is displayed on the wired remote control and operations cannot be started or
stopped from the wired remote control during prohibition of local input.
It is also possible to release local prohibition from the central remote control.
(Most recent input is given priority.)
▼ IN3: Not used
* Do the wiring as shown to the right for input of either "Voltage ON: WET" or "Voltage
OFF: DRY".
"Voltage OFF" input
Set the input switch (SW5) to the "Voltage OFF: DRY" side.
(Factory default: Voltage OFF (DRY) side)
12 V TB2
COM
Input 1
IN1
Input 2
IN2
IN3
"Voltage ON" input
Set the input switch (SW5) to the "Voltage ON: WET" side.
(Factory default: Voltage OFF (DRY) side)
Use 12 to 24 VDC for external power source.
Approximately 10 mA input current is required for each contact.
Be careful of the capacity of the power source.
(Do not apply 208/230 VAC)
Connect COM terminal to + side of the power supply.
TB2 12 to 24 VDC
+ V −
COM
Input 1
IN1
Input 2
IN2
IN3
<Wiring specifications>
Wire type: Sheathed vinyl cord, single strand
Wire thickness: AWG14 to AWG16 (prep 0.35" to 0.4" (9 to 10mm) of the tips of wires)
Total wire length: Max 230' (70m)
* If you use twisted strand wires, connect a pin terminator.
CAUTION
Separate power lines when wiring to prevent misoperations.

Other functions

▼ EXCT(CN4)
Can thermostat. OFF by shorting this connector.
Use contacts for micro-currents when using external contacts.
(Use ones that have minimum application loads of 12 VDC and 1 mA or less.)

LED display

▼ Power LED (LD1) [Red]
Lights when running and power is supplied.
Normally lighted, but flashes if a transmission trouble occurs on the indoor unit P.C. board.
▼ Regular operation LED (LD2) [Green]
Lights when transmission with indoor unit P.C. board is established and operation is
regular.
Use contacts for micro-currents.
(Use ones that have minimum application
loads of 12 VDC and 1 mA or less.)
Input 3
Use contacts for micro-currents.
(Use ones that have minimum
application loads of 12 VDC and 1 mA
or less.)
Input 3
<External analog input terminal: TB3>
It is possible to change the indoor unit's operation mode (AN1), set temperature (AN2),
and blower setting (AN3) by connecting a variable resistor to the analog input terminal.
* When both the wired remote control and the central control are used, the most
recent setting has priority.
TB3
AN1
AN2
AN3
COM
Do not apply voltage or current to AN1, AN2, AN3, or COM.
<Operation mode: AN1>
Operation switching
Stop
Fan
Cool
Heat
<Set temperature: AN2>
Set temperature (°F/°C)
62/17
64/18
66/19
68/20
69/21
71/22
73/23
75/24
77/25
78/26
80/27
82/28
84/29
86/30
<Blower setting: AN3>
Blower setting
Auto
Fast
High
Low
<Wiring specifications>
Wire type: Sheathed vinyl cord, single strand
Wire thickness: AWG14 to AWG16 (prep 0.35" to 0.4" (9 to 10mm) of the tips of wires)
Total wire length: Max 230' (70m)
* If you use twisted strand wires, connect a pin terminator.
CAUTION
Separate power lines when wiring to prevent misoperations.
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Variable resistance
Refer to the following table for the
various resistance settings.
External resistance (Ω)
30
60
90
120
External resistance (Ω)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
External resistance (Ω)
30
60
90
120