HVACopediaTrane · Heat pump
Force defrost button Force a defrost cycle
What the display is showing
The control board has a forced defrost button. Holding it starts a defrost; the display then shows 7 as the first digit (7 / Defrosting). Raising the defrost termination temperature is possible by clipping the termination jumper pin.
Applies to: 5TWR7 multi-speed outdoor drive
What to do
- Run the unit in heating mode with the thermostat calling (not possible in cooling).
- Hold the forced defrost button on the control board down for over 5 seconds.
- The display shows 7 as the first digit when forced defrost begins.
Settings for these units
Outdoor unit placement · Trane 5TWR7
| Item | Value |
|---|---|
| Above unit | 5 ft clear |
| Service side | 3 ft |
| Walls / shrubs | 12 in. min |
| Pad | 1 in. larger than unit all round, level, separate from house |
| Cold climate (HP) | raise 3-12 in. above pad |
| Within 1 mile of salt water | add BAYSEAC001 if no factory salt shield |
| Operating range | cooling 55-120 F, heating 0-66 F |
Avoid bedroom walls and under roof drip lines.
Dimensions and weights · Trane 5TWR7
| Model | H x D x W (in.) | Weight (lb) |
|---|---|---|
| 5TWR7024A | 41 x 30 x 33 | 181 |
| 5TWR7036A | 41 x 30 x 33 | 194 |
| 5TWR7048A | 41 x 34 x 37 | 231 |
| 5TWR7060A | 41 x 34 x 37 | 241 |
| 5TTR7024A | 41 x 30 x 33 | 176 |
| 5TTR7036A | 41 x 30 x 33 | 189 |
| 5TTR7048A | 41 x 34 x 37 | 226 |
| 5TTR7060A | 41 x 34 x 37 | 236 |
Weights are estimated, uncrated.
Models that show this code
4 models in Trane 5TWR7
Other codes on the same units
- FA Outdoor ambient sensor fault
- FC Coil temperature sensor fault
- Fault history mode Fault history diagnostics mode
- Fd Discharge temperature sensor fault
- Fr No 24 VAC R signal at outdoor control (heat pump)
- HC Hard lock: compressor over-current
- HF Hard lock: outdoor fan over-current
- HH Hard lock: high pressure (HPCO / DTC)
Save it for the next call
Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.
Source: Trane 5TTR7/5TWR7 installation ODR-SVN002E-EN, Forced Defrost, p.34. Summarized in our own words; check the original manual for your model.
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.