Table of Contents
Advertisement
CONNECTOR SPECIFICATIONS OF P.C. BOARD MCC- 1570
Function
Connector
Output signal of
Fan speed,
CN510
Electric Heater,
(WHI)
Cooling Stage1,
Cooling Stage2
CN80
External error input
(GRN)
Thermo OFF input
CN73
(Free cooling
(RED)
mode input)
CN61
HA
(YEL)
CN60
Optional output
(WHI)
Fan
CN32
output
(WHI)
CN34
Float switch input
(RED)
CN70
Option error input
(WHI)
CHK
CN71
Operation check
(WHI)
DISP
CN72
Display mode
(WHI)
Table 23 – Connector Specifications of P.C. Board MCC- 1570
Pin
Function
1
COM (DC12V)
2
(no function)
3
Fan speed "Low" output
4
Cooling Stage1
5
Fan speed "Medium" output
6
Cooling Stage2
7
Fan speed"High" output
8
(no function)
9
Electrical heater output
10- 20
(No function)
1
COM (DC12V)
2
(no function)
3
External error input
1
Demand input
2
0V (COM)
1
ON/OFF input
2
0V (COM) for pin 1, 3
3
Remote control disabling input
4
Operation ON output
5
DC12V (COM) for pin 4, 6
6
Alarm output
1
DC12V (COM)
2
Defrosting output
3
Thermostat ON output
Cooling output / auxiliary heating
4
output
5
Heating output
6
Fan output
1
DC12V (COM)
2
Fan Output
1
COM (DC12V)
2
3
External safety contact
1
Option
2
0V (COM)
1
Check mode input
2
0V (COM)
1
Display mode input
2
0V (COM)
Remarks
Connected to MCC - 1431/CN02PIN1
Connected to MCC - 1431/CN02PIN3
Connected to Cooling Stage1 relay
Connected to MCC - 1431/CN02PIN5
Connected to Cooling Stage2 relay
Connected to MCC - 1431/CN02PIN7
Connected to MCC - 1431/CN02PIN9
Error input from outside (Economizer or Electric heat
temperature limit) If error occurs more than one minute,
L30 will display on remote control. This is connected to the
economizer alarm relay as well as the manual reset
temperature limit in the fan housing. Check the Honeywell
for the error, if there is no error, check the manual reset
temperature limit in the fan housing. If this is tripped,
determine the cause before resetting.
Forced thermo- off input.
Connected to Thermo OFF relay.
Start/Stop input
Enables/Disables start/stop control via remote control
ON signal output during Remote controller ON
ON signal output during alarm ON
ON while outdoor unit defrosted
ON while real thermostat ON
SW501 bit1/2=ON/OFF or OFF/ON set, ON while unit is in
cooling or related operation (COOL, DRY, or cooling under
AUTO mode)
SW501 bit1/2=OFF/OFF or ON/ON and DN[DC] set as
0001 to 0010, this output become "auxiliary heating" output.
Cooling : Open, Heating : Close. Connected to Heating
output relay.
ON while fan ON
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)
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 becomes available (upon turning on
of power) Timer short- circuited out (always)
38
Advertisement
Table of Contents
