HVACopediaGoodman-Amana-Daikin · Air handler · Other
R-32 leak detection response and test
What happens, in order
- Sensor detects R-32 in the coil area
- RDS tells the system to drop the thermostat call, run the blower for air circulation and switch off electric heat
- Red LED on the board flashes fast while the alarm is active
- After the leak clears the board stays in mitigation for 5 minutes (LED on steady) before normal operation
- Unit must stay powered except for service; do not open or shut off the unit during an alarm
- Test press the board button twice within 5 s to simulate a leak for 5 minutes; press once to end the test early
Timings and thresholds
| Item | Value |
|---|---|
| Normal operation LED | slow flash, 2 s on / 2 s off |
| Mitigation hold after alarm | 5 min |
| Test run | 5 min max |
| Board internal fault | 2 flashes then 5 s off |
| Sensor communication fault | 3 flashes then 5 s off |
| Sensor fault | 4 flashes then 5 s off |
Codes you may see during this
2 3 4 flashes (LED)
Applies to: Goodman R-32 GLXS / GLZS / ALXS / ALZS and AMST / AWST air handlers
Models
Take it to the job
Sequences of operation, error codes and tips work offline in the HVACopedia app.
Source: Goodman R-32 service RS6200301, Refrigerant Detection System. Written in our own words; timings can differ by model and software version, so check the manual for your exact unit.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.