Transmission Error Between Indoor And Outdoor Unit / Piping And Wiring Mismatch / Refrigerant Shortage - Daikin SkyAir GQI-Eco Series Service Manual

SiBE281013
4.38 Transmission Error between Indoor and Outdoor Unit /
Piping and Wiring Mismatch / Refrigerant Shortage
UF
Remote
Controller
Display
Applicable RZQG
Models
Method of Error Check the transmission between the indoor and outdoor units with a micro-computer when the
power turned ON.
Detection
Detect by checking the following temperature differences during compressor operation.
Error Decision When the inter-unit wiring between the indoor and outdoor units is incorrect
When the following conditions continue for 20 minutes during compressor operation
Conditions
Supposed
Causes
Service Diagnosis
A: Difference in temperature detected by the indoor heat exchanger thermistor (R2T) and
the indoor suction air thermistor (R1T)
B: Difference in evaporation temperature (Te) (or condensation temperature (Tc) during
heating operation) detected by the indoor heat exchanger thermistor (R2T) and the
compressor sensor
A: R2T – R1T < 4ºC, and
B: R2T – Te (or Tc during heating operation) > 14ºC (24ºC during heating operation)
Defective inter-unit wiring between the indoor and outdoor units
Mismatching of wiring and piping
Refrigerant shortage (shortage of gas)
Clogged refrigerant piping system
Troubleshooting by Remote Controller
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