American Standard, At a Glance
What’s Wrong With Your American Standard Air Conditioner?
Common Air Conditioner Problems and Troubleshooting
Not enough cooling output?
Leaks?
Compressor won’t work?
Not working at all?
Dirty filter?
Refrigerant leaks?
Fan won’t run?
American Standard Air Conditioner Error Codes
Error Codes
LED Color | Fault LED | Alert Code | Description | Control Display |
---|---|---|---|---|
Red | 1 Flash | 90 | Excessive Communication Errors | N/A |
91 | Loss of heat/cool demand message | ERR 91 | ||
Loss of Bit Master (Clock Signal) | ERR 91 | |||
Red | 2 Flash | 68 | Defrost Fault A | N/A |
Red | 3 Flash | Defrost Fault B and/or C | N/A | |
Red | 4 Flash | Defrost Fault A and (B and/or C | N/A | |
Red | 5 flash | 67 | Ambient Temperature Sensor fault ( Out of range - open or shorted) | ERR 67 |
Red | 6 flash | Coil Temperature Sensor Fault ( Out of range - open or shorted) | ERR 67 | |
Red | 7 Flash | 79 | Low Pressure Cutout Fault (Open outside of defrost cycle-hard lock out, cycle power to reset | ERR 79 |
Low Pressure Cutout Fault Heat/Cool Lock out | ERR 79 | |||
Low Pressure Cutout Fault (Open outside of defrost cycle-short lock out | Wait | |||
Red | 10 Flash | 102 | Y2 without Y1 - Miswire (24 Volt mode only) | N/A |
Red | 11 Flash | 67 | Liquid Temperature Sensor Fault (Out of range - Open or Shorted) | N/A |
Red | 12 Flash | 113 | Liquid Pressure Sensor Fault (Out of Range - Open or Shorted) | ERR 113 |
Red | 13 Flash | 67 | External Outdoor Temperature Sensor Fault (Out of Range - Shorted | N/A |
Red | 14 Flash | 114 | PM Missing with local copy (Operational) | ERR 114 |
Bad Data in PM with local copy (Operational) | N/A | |||
Bad Data in PM no local copy (Not operational) | ERR 114 | |||
PM missing with no local copy (Not operational) | ERR 144 | |||
Red | 15 Flash* | 50 | Duplicate OD Temperature Sensor | N/A |
Red | 16 Flash* | 123 | Demand Configuration Fault* | N/A |
Red | 17 Flash | 80 | High Pressure Monitor Fault (Hard lock out, cycle power to reset) | ERR 80 |
High Pressure Monitor Fault (Short lock out) | Wait | |||
Red | 18 Flash | 18 | 24V Sensing Error (24V Missing at Y1) | ERR 18 |
Green | Slow | 1 Time Per Second | Standby/Idle | |
Green | Medium | 2 Times Per Second | Call for Capacity | |
Green | Fast | 5 Times Per Second | Power Up Delay | |
Green | Solid on | Test Mode | ||
Green | Intermittent | 1 Flash Every 4 Seconds | Hard Lockout | |
Amber | Slow | 1 Time Per Device | Device Count | |
Amber | Fast | 5 Times Per Second | Loss of Communication |