Full Gauge TC-900E power / TC-900E 2HP
Three-relay controller (compressor, defrost, fans) with up to three probes, economy set point, fast freezing, door input and condenser protection.
What it is: Refrigeration controller (cooling, defrost, fans). Both versions share the same menu and parameter list; they differ in relay rating.
Key combo: Press ▲ and ▼ together for F01 (access code). Hold ▼ 4 s for manual defrost. A scroll key opens the quick menu (defrost, eco, fast freeze, lock, control off).
Full Gauge TC-900E power / TC-900E 2HP error codes
| Display | Meaning |
|---|---|
| Err1 | Room (S1) probe disconnected or out of range |
| Err2 | Evaporator (S2) probe disconnected or out of range |
| Err3 | Third probe (S3) disconnected or out of range |
| Athi / Atlo | Room temperature above F07 / below F47 |
| AC1 / AC2 | Condenser too hot, first and second level (F49 / F44) |
| ALrC | Compressor ran longer than F46 without reaching set point |
| ALrE | Alarm from a digital input |
| Opn / AOPn | Door open / door open too long (F50) |
| eCO | Running on the economy set point |
| OFF | Control routines switched off |
| LOC On / LOC OFF | Settings locked / unlocked |
| . (dot on display) | Defrost ended on time, not on temperature |
| eCAL | Calibration fault: contact Full Gauge |
| PPPP | Settings need to be re-entered |
| dEL / Fan / rEFr / Pre / dEFr / dRAi | Status: start delay / fan delay / cooling / pump-down / defrost / drip |
How to enter service / parameter mode
- Set point: hold SET 2 s, change with ▲/▼, press SET.
- Parameters: press ▲ and ▼ together until F01 shows, tap SET and enter the access code from the manual. You can view settings without the code but not change them.
- Pick with ▲/▼, tap SET, change, tap SET to store. Long-press SET until ---- to leave.
- Unlock: power up holding ▲ for about 10 s until LOC OFF shows.
- A second code from the manual selects °C or °F.
Parameter list
| Code | What it does | Range | Default / typical |
|---|---|---|---|
| F02 | Differential (normal) | 0.1–20 °C | 2 |
| F03 | Room probe offset | -20 to 20 °C | 0 |
| F04 / F05 | Lowest / highest user set point | -50 to 105 °C | -50 / 105 |
| F06 | Start-up delay | no–30 min | no |
| F07 | High room alarm | -50 to 105 °C | 105 |
| F08 | Cooling time between defrosts | 1–999 min | 240 |
| F09 / F10 | Minimum compressor on / off time | no–999 s | 0 / 0 |
| F11 | Compressor with failed S1: off / on / cycle (F37–F38) | 0–2 | 1 |
| F12 | Defrost at power-up | no / yes | no |
| F13 | Evaporator temperature that ends defrost | -50 to 105 °C | 30 |
| F14 | Maximum defrost time | no–90 min | 30 |
| F15 | Fans on in defrost | off / on | off |
| F16 | Electric (0) or hot gas (1) defrost | 0 / 1 | 0 |
| F17 | Hold display after defrost | no–99 min | no |
| F18 | Drip time | no–99 min | 1 |
| F19 / F20 | Fan restart: evaporator temperature / maximum delay | -50 to 105 °C / 0–30 min | 20 / 1 |
| F21 | Fan mode | 0–7 | 4 |
| F22 | Stop fans if evaporator above | -50 to 105 °C | 30 |
| F23 | Pump-down time before defrost | no–999 min | no |
| F24 | Room probe filter | 0–9 | 0 |
| F25 | Time evaporator must stay cold before temperature defrost | 0–90 min | 0 |
| F26 / F27 | Normal / economy set point | -50 to 105 °C | -15 / -10 |
| F28 | Economy differential | 0.1–20 °C | 2 |
| F29 | Door-closed time before economy mode | no–999 min | no |
| F30 / F31 | S3–S1 difference to enter / leave economy | 0.1–20 °C | 2 / 5 |
| F32 | Maximum time in economy | no–100 h | no |
| F33 / F34 | Fast-freeze limit temperature / time | -50 to 105 °C / no–999 min | -25 / no |
| F35 / F36 | Fan on / off times | 1–99 min | 2 / 8 |
| F37 / F38 | Compressor on / off time with failed S1 | 0–999 min | 0 / 0 |
| F39 | Start defrost by time (0) or temperature (1) | 0 / 1 | 0 |
| F40 | Door-open time that triggers a defrost | no–999 min | no |
| F41 | Evaporator temperature that starts defrost | -50 to 105 °C | -50 |
| F42 / F43 | Door-open time to stop fans / all outputs | no–999 min | no |
| F44 / F45 | Condenser cut-out temperature / differential | no–105 °C / 0.1–20 °C | 55 / 5 |
| F46 | Compressor run time without reaching set point before shutdown | no–999 min | no |
| F47 | Low room alarm | -50 to 105 °C | -50 |
| F48 | Temperature alarm delay | no–999 min | no |
| F49 | Condenser alarm temperature | 0–105 °C | 45 |
| F50 | Door-open alarm time | no–999 min | no |
| F51 | Buzzer | off / on | off |
| F52 | Digital input 1 / S3 function | off–13 | off |
| F53 | Digital input 2 function | off–10 | off |
| F54 / F55 | S2 / S3 probe offset (S2 off = no evaporator probe) | -20 to 20 °C | 0 / 0 |
| F56 | Who may switch control off | no–4 | no |
| F57 / F58 | Lock mode / hold time to lock | 0–2 / 15–60 s | 0 / 15 |
For licensed technicians only. This equipment can involve mains voltage, high-voltage microwave circuits, gas and refrigerant. Isolate power (and gas) before opening panels, follow the manufacturer's manual and your local licensing rules (for example ARC refrigerant handling and electrical or gas licences). Wrong settings can spoil food or damage equipment. Check every value on the unit in front of you before changing it.
Based on: Full Gauge TC-900E power and TC-900E 2HP instruction manuals. Always check the manual for your exact model and software version.
ServiceModes is not affiliated with Full Gauge or any other manufacturer. Written in our own words from the manufacturer's documentation.
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