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CONFIGURATION
Heat ON Delay (sec.)
SW1-1
4
3
2
60*
1
ON
4
3
2
25
1
ON
*Default
Cool Off Delay Setting
The default cool off delay is 90 seconds. If dehumidification control via the thermostat is not desired, the cool off
delay can be changed to 5 seconds by placing a jumper between the Y/Y2 and DHUM thermostat inputs.
Automatic Configuration
50M56U-751 automatically configures its functional operation to match that of the OEM control being replaced
across a variety of Carrier and ICP applications. This automatic configuration feature allows 50M56U-751 to
accept various connections (HPS Input, Inducer Ground, or Not Connected) on Pin 3 of the 11 Pin main harness
connector. See the Wiring Diagram for additional details on connections specific to your application
SELF TEST
Enter Self-Test immediately after control
power up by:
• Double pressing the "FAULT RECALL" button while
LED rapid flashes green.
NOTE: Control will terminate Self-Test mode if any
system fault occurs. Control will ignore any active
thermostat calls during Self-Test.
Sequence is as follows:
• LED will flash all stored fault codes five times. If there
are no faults LED will be off for 2 seconds.
• Afterward, the LED will slowly flash code 11 in alternate
4
Constant Fan Speed
SW1-2
4
3
HEAT*
2
1
OFF
ON
4
3
FAN
2
1
OFF
ON
Heat OFF Delay (sec.)
SW1- 3 & 4
4
180
3
2
1
OFF
ON
4
1
120*
3
2
3
2
4
1
OFF
ON
colors (green, amber, red) to indicate Self-Test is
active. This will continue until Self-Test is complete.
• Inducer motor will turn ON and continue running until
Self-Test is complete.
• After 15 seconds, the ignitor will turn ON for 15 seconds,
then OFF.
• Blower motor runs at the Fan (SW1-2), Heat, and Cool
speeds respectively for 10 seconds each.
• Blower and Inducer motors turn OFF.
• Self-Test is complete, LED will display solid green to
indicate Standby mode.
4
150
3
2
1
OFF
OFF
ON
4
1
90
3
2
3
2
4
1
OFF
OFF
ON
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