Carrier Infinity SYSTXCCUID01- B - Manual (Page 15)

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static pressure. If it is reduced before one hour has elapsed, it will
resume cooling operation. After one hour, cooling will be resumed.
Dehumidify Operation
Once a target cooling humidity setpoint is selected in the Advanced
Setup COOLING HUMIDITY screen, two other setup options
affect Dehumidify operation: AC AIRFLOW and DEHUMIDIFY.
AC AIRFLOW: This setting is located in the Furnace or Fan Coil
Setup screens and must be set to COMFORT to enable normal
dehumidify operation. If set to EFFICIENCY or MAXIMUM, no
special dehumidify operation will take place during a normal
cooling call. Cooling will only operate to satisfy the space
temperature setpoint.
DEHUMIDIFY: Located in the Cooling Humidity screen of the
Advanced Setup, this option has 2 settings: ON and OFF.
If DEHUMIDIFY is set to ON (factory default), then the cooling
unit will be allowed to overcool the space up to 3_F / 2_C if the
humidity level is above the cooling humidity target setpoint.
The amount of over--cooling allowed varies with the
dehumidification demand, the cooling demand, and the actual
space temperature. More over--cooling is allowed with greater
dehumidification demand.
When the space temperature is at or above 75_F / 24_C and the
dehumidify demand is high, over--cooling up to 3_F / 2_C
is
allowed. As the space temperature approaches 70_F / 21_C, less
over--cooling is allowed. At 70_F / 21_C space temperature, no
more over--cooling is allowed no matter how great the dehumidify
demand. This is done to protect the equipment.
If DEHUMIDIFY is set to OFF and AC Airflow is set to
COMFORT, normal dehumidification mode is enabled. For
normal dehumidification, no over--cooling is allowed when the
cooling humidity is above the target setpoint, but airflow will be
reduced during a normal cooling mode to reduce humidity. The
airflow depends on the amount of dehumidify demand. If AC
Airflow is set to EFFICIENCY or MAXIMUM, only
Dehumidify (over--cooling to dehumidify) will be performed.
Hybrid Heat Setup / Operation
Furnace Lockout — (in HYBRID HEAT SETUP menu) is the
outside temperature above which the furnace will not run except
for defrost (otherwise known as the aux heat lockout).
Heat Pump Lockout — (in HYBRID HEAT SETUP) is the
outside temperature below which the heat pump will not run
(otherwise known as the balance point).
These values can be set identical to each other. If they are not
identical, the system will stage up and down normally from heat
pump to furnace when the outside temperature is between these
settings. The User Interface will not allow the heat pump lockout
setting to be above the furnace lockout setting.
The factory default settings for both of these is NONE (no
lockouts). Even though a heat pump lockout temperature may be
set, the system will still use the furnace in defrost operation, and
may stage back down to heat pump when defrost is completed after
a 2 minute delay.
Hybrid Heat Defrost — (in HYBRID HEAT SETUP) When the
outdoor unit needs a defrost cycle, the furnace will run during
defrost regardless of lockout temperature, unless told not to in the
Hybrid Heat Setup screen. After defrost, the system may stage
down to heat pump after a 2 minute delay.
TROUBLESHOOTING
Please refer to the Troubleshooting Guide available on HVAC Partners for more detail.
Infinity Control does not power up.
1. Recheck wiring to ABCD on all devices.
2. Make sure all colors match for every terminal.
3. Make sure power is applied to the indoor unit, and the amber LED is lit on indoor control circuit board.
4. Check for 24VAC between the C and D terminals at Infinity Control terminal connector and Damper Control Module.
5. Check fuse on indoor unit’s circuit board.
Display says “Indoor Unit Not Found”
1. Recheck wiring to ABCD on all devices.
2. Make sure all colors match for every terminal.
3. Press left--side button to try again.
4. If display still reads “Indoor Unit Not Found”, disconnect accessories and all devices from ABCD and connect User Interface directly
to indoor unit with a short piece of thermostat wire. Add other devices one at a time to determine where the communication issue
exists.
Display says “Outdoor Unit Not Found” and I have a two--stage communicating outdoor unit:
1. Recheck wiring to ABCD connector on outdoor unit.
2. Make sure all colors match for every terminal.
3. Check for 24VAC between the C and D terminal connector of outdoor unit.
I made a mistake on the start--up screens and pressed the right--side button to get to the run mode. How do I get back to start--up?
1. Press the ADVANCED button for at least 10 seconds.
2. Install/Service menu will appear.
3. Scroll down to the INSTALL selection.
4. Press the right--side button; the screen will prompt you to press the right side again to re--install the system.
To check current system status.
1. Press and hold the right side button for 3 seconds. This will display the current active system faults.
2. If no faults are active, the Status screen will show status of each component in the system.
CCUI
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B