Gas Shortage Function - Daikin Sky Air R-407C Service Manual

ESIE02–01
1.12

Gas Shortage Function

Applicable units R(Y)P71-250B
Purpose The purpose of the gas shortage function is to detect refrigerant shortage before the unit stops due to
a discharge temperature that is too high.
Method When the thermostat is turned OFF due to a discharge pipe temperature that is too high and the E.V.
opening is 450 pulses or more, the gas shortage error is activated. However, operation does not stop
due to gas shortage.
To check the gas shortage error (U0), see page 3–54.
Used input The gas shortage function uses the following inputs:
Input
Outdoor discharge thermistor
Outdoor expansion valve
Part 2 – Functional Description
General Functionality
Connection on Connection on
indoor PCB outdoor PCB
— R3T-X6A
— Y1E-X24A
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