Toshiba Carrier MMDMMD-AP0120VHG2UL Installation, Operation And Maintenance Manual page 35

Vertical air handling unit
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SPECIAL INSTRUCTIONS—CONTROLS
■P.C. Board Optional Switch/Connector Specifications (MCC-1570)
Function
Connector
Fan
CN32
output
(WHI)
Float
CN34
switch
(RED)
input
Optional
CN60
output
(WHI)
CN61
HA
(YEL)
CN70
(WHI)
CHK
CN71
Operation
(WHI)
check
DISP
CN72
Display
(WHI)
mode
EXCT
CN73
Demand
(RED)
External
CN80
error input
(GRN)
External
CN510
output
(WHI)
035-000051-001
Pin
Function
1
DC12V (COM)
2
Fan Output
1
COM (DC12V)
2
3
External safety contact
1
DC12V (COM)
2
Defrosting output
3
Thermostat ON output
Cooling output / auxiliary
4
heating output
5
Heating output
6
Fan output
1
ON/OFF input
2
0V (COM) for pin 1, 3
Remote control disabling
3
input
4
In-operation output
DC12V (COM) for pin 4,
5
6
6
Alarm output
1
Option
2
0V (COM)
1
Check mode input
2
0V (COM)
1
Display mode input
2
0V (COM)
1
Demand input
2
0V (COM)
1
COM (DC12V)
2
COM (DC12V)
3
External error input
1
COM (DC12V)
2
(no function)
3
Fan tap "HH" output
4
(no function)
5
Fan tap "H" output
6
(no function)
7
Fan tap "L" output
8
(no function)
9
Electrical heater output
10-20
(No function)
Page 35 of 60
Remarks
Factory default setting : ON when indoor unit
in operation and OFF when indoor unit at
rest. *Fan can be operated on its own by
pressing FAN button on remote control
(DN31)
Error code P10, Normal close.
(Short pin is connected as default)
ON while outdoor unit defrosted
ON while real thermostat ON
ON while air conditioner in cooling or related
operation (COOL, DRY, or cooling under
AUTO mode)
By DN[DC] set as 0001 to 0010, this output
become "auxiliary heating" output.
Cooling : Open, Heating : Close
ON while fan ON
Start/Stop input
Enables/Disables start/stop control via re-
mote control
ON during operation
ON while alarm ON
Option error input
Used for indoor operation check (prescribed
operational status output, such as indoor fan
"H", to be generated without communication
with outdoor unit or remote controller).
Product display mode –Communication just
between indoor unit and remote control be-
comes available (upon turning on of power)
Timer short-circuited out (always)
Forced thermo-off input
Error input from outside (Interlock, error code
L30). Only if this condition continue more
than 1 minute.
Fan Speed (High)
Fan Speed (Med)
Fan Speed (Low)
MMD IOM 1.2 11-10-2020
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