Discharge Pipe Temperature Control - Daikin FTXN-LV Troubleshooting Manual

- The compressor frequency is adjusted based on coil temperature:
• During cooling mode – outdoor coil temperature.
• During heating mode – indoor coil temperature.
- This protection is activated when the coil temperature > 64°C, the compressor stop and OD fan stop after
30s.
- The unit can only be restarted after 3 minutes.

DISCHARGE PIPE TEMPERATURE CONTROL

Used as a measure of the compressor's internal temperature.
-
- Compressor frequency is control to keep this temperature from going up further when it rises above a
certain level.
- If compressor discharge temperature >102°C (111°C) for the first time, this control starts and set the
current frequency as upper limit. At the same time, running frequency start to reduce by 1 step and so on,
until temperature falls between 99°C (109°C)and 90°C (107°C) – at the maintain zone.
- This protection is activated when the compressor discharge temperature > 110°C (120°C). The
compressor will stop and considered trip.
- If the compressor discharge temperature < 90°C (107°C), the compressor frequency will be reset based
on the OD ambient, set and room temperature.
TS13-01 Troubleshooting manual 13