Uf Transmission Error Between Indoor And Outdoor Unit / Piping And Wiring Mismatch / Refrigerant Shortage - Daikin R71FUV1 Service Manual

Si20-701_B
UF
3.107
between Indoor and Outdoor
Unit / Piping and Wiring
Mismatch / Refrigerant
Shortage
Remote Controller Display
UF
Applicable Models
RZQ-K/H, RZR-KU/HU, RZQG
Method of Error Detection
Check the transmission between the indoor and outdoor
units with a micro-computer when the power turned ON.
Detect by checking the following temperature differences
during compressor operation.
A: Difference in temperature detected by the indoor
heat exchanger thermistor and the indoor suction
air thermistor
B: Difference in indoor suction air thermistor
evaporation temperature (Te) (or condensing
temperature (Tc) during heating operation) detected
by the indoor heat exchanger thermistor and the
compressor sensor
Error Decision Conditions
When the transmission wiring between the indoor and
outdoor units is incorrect
When the following conditions continue for 20 minutes
during compressor operation
A: indoor heat exchanger thermistor – indoor suction
air thermistor < 4ºC, and
B: indoor heat exchanger thermistor – Te (or Tc during
heating operation) > 14ºC (24ºC during heating
operation)
450
Transmission Error
Troubleshooting by Remote Controller