Service Manual
Table Of Contents
- Cover
- Table of contents
- Part 1 List of Functions
- Part 2 Specifications
- Part 3 Printed Circuit Board Connector Wiring Diagram
- Part 4 Refrigerant Circuit
- Part 5 Functions and Control
- Part 6 Test Operation and Field Settings
- Part 7 Remote Controller
- Part 8 Troubleshooting
- 1. Troubleshooting with LED
- 2. Service Diagnosis
- 3. Error Codes and Description
- 4. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series
- 5. Troubleshooting for FFQ Series
- 6. Troubleshooting for Branch Provider (BP) Unit
- 7. Troubleshooting for Outdoor Unit
- 8. Thermistor Resistance/Temperature Characteristics
- 9. Pressure Sensor
- 10. Method of Replacing Inverter’s Power Transistors Modules
- Part 9 Appendix
SiUS181631EA Protection Control
Functions and Control 63
4.3 Discharge Pipe Temperature Protection Control
Outline Discharge pipe temperature protection control protects the compressor internal temperature
against a malfunction or temporary increase of discharge pipe temperature.
Compressor
or
36 Hz Unload
or
After 30 sec.
After 20 sec.
or
Discharge pipe
temperature standby
(R19083)
Discharge pipe temperature
protection control not limited
Upper limit frequency:
1-step down from current
compressor frequency
Discharge pipe temperature
protection control
Upper limit frequency: 1-step up
from current compressor frequency
When occurring 3 times within 100 minutes,
the error code F3 is output.
HTdi : Value of discharge pipe temperature (Tdi)
compensated with outdoor temperature
Tp : Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
HTdi > 115˚C
(239˚F)
Tp > 135˚C
(275˚F)
or
HTdi > 115˚C
(239˚F)
Tp > 135˚C
(275˚F)
HTdi < 100˚C (212˚F)
Tp < 110˚C (230˚F)
&
HTdi < 100˚C (212˚F)
Tp < 125˚C (257˚F)
HTdi > 130˚C
(266˚F)
HTdi > 120˚C
(248˚F)
for 90 sec. or
more.
HTdi > 135˚C (275˚F)
HTdi > 120˚C (248˚F) for 10 min. or more.
&