Bryant SYSTXBBUIZ01 instruction manual Troubleshooting

TROUBLESHOOTING

Evolution Zone 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 Evolution Zone 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 all devices from ABCD and connect User Interface directly to indoor unit.

Display says ″Outdoor Unit Not Found″, and I have a two- speed 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 hit 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.

Control does not see zones 5 through 8.

1.Make sure zone module 5 - 8 has the DIP switches set to the right.

2.Recheck wiring to the ABCD connectors.

Control says I have zones 5 - 8 but not 1 - 4.

1.Make sure zone module 1 - 4 has the DIP switches set to the left.

2.Recheck wiring to the ABCD connectors.

Some zones in my zoned system do not provide enough comfort. (A noticeable difference exists between the actual room temperature and operating set point, yet the equipment does not turn on).

1.The zone airflow limit may be set too low. Perform the Zone Airflow Limit Checkout procedure, raise airflow limit setting, if possible.

Some zones provide too much airflow and are noisy.

1.The zone airflow limit may be set too high. Perform the Zone Airflow Limit Checkout procedure, lower airflow limit setting if possible.

CRITICAL MALFUNCTION SCREEN

The following errors will cause a Critical Malfunction screen to pop up. Heat and Cool LEDs will alternately flash at a 1 second rate. This appears when system cannot deliver any conditioning at all.

FAN COIL

Code 16 = Communication Fault

—13—

OUTSIDE: 94o FAN: AUTO

71ALERT˚!

HVAC SERVICE 1 800 555-1212

CRITICAL MALFUNCTION

CALL TECHNICIAN

Fig. 26 — Critical Malfunction Screen

A04027

Code 44 - Blower Communication Fault

Code 41 - Blower Motor Fault

FURNACE

Code 15 - Blower Motor Lockout

Code 22 - Abnormal Flame Proving Signal (not dual fuel)

Code 41 - Blower Motor Fault

USER INTERFACE

No communication with indoor unit

SYSTEM MALFUNCTION SCREEN

This screen appears when system cannot completely deliver conditioning. The following errors will cause a System Malfunc- tion Screen to pop up:

OUTSIDE: 94o FAN: AUTO

71˚

HVAC SERVICE 1 800 555-1212

SYSTEM MALFUNCTION

CALL TECHNICIAN

DISMISS

NOTICE >

Fig. 27 — System Malfunction Screen

A04028

FAN COIL

Code 37 - Heater output sensed ON when not energized

FURNACE

Code 13 - Limit Circuit Lockout

Code 14 - Ignition Lockout

Code 21 - Gas Heating Lockout

Code 22 - Abnormal Flame Proving Signal (dual fuel only)

Code 23 - Pressure Switch Did Not Open

Code 24 - Secondary Voltage Fuse Open

Code 33 - Limit Circuit Fault AND High Heat Only is active

Code 45 - Control Circuitry Lockout

NOTE: For all the above furnace error codes, the system will use heat pump heating exclusively if available. When the error code is cleared or disappears, furnace heating will resume.

TWO-SPEED OUTDOOR UNIT

Code 85 - VC voltage at standby

Code 86 - High capacity compressor lockout

USER INTERFACE

Temp Sensor Failed, ″NO SENSOR DATA″ shown in place of actual temp.

Outdoor Unit communication fault.

Network Interface Module (NIM) communication fault

Defrost Error (defrost signal on for more than 15 minutes)

The user can press the right side button to dismiss the notice. The regular run mode screen will then appear except ″SYSTEM MALFUNCTION″ will appear in place of the day/time. If the error has not disappeared within 24 hours, the above display will return. If the error code disappears, ″SYSTEM MALFUNCTION″ will disappear and the day/time will reappear.