Daikin VRV Inverter K Series - 3.21 Malfunction of Transmission Between Master and Slave Remote Controllers; 3.24 Address Duplication of Central Remote Controller

Troubleshooting SiE-05C
304 Troubleshooting PLUS Series
3.5 Outdoor Unit: Actuation of Low Pressure Switch
Remote Controller
Display
EE
EE
44
44
Supposed Causes  Abnormal drop of low pressure (0 kg/cm² [0 MPa])
 Defect of low pressure sensor
 Defect of outdoor unit PC board
Trobleshooting
∗1: Voltage measurement point
∗2: Refer to the pressure sensor, pressure - voltage characteristics table.
Refer to Pressure Sensor Voltage Output / Detected Pressure Characteristics on P366
YES
YES
Out of gas, refrigerant
system clogging, wiring and
piping wrong connection
Replace the low pressure
sensor.
Replace outdoor unit PC
board INV outdoor unit: A1P
Constant speed outdoor unit:
EC
Low
pressure at stop due
to malfunction is
0.0 kg / cm
²
Measure
the voltage (VL)
of X21A pin No. (2) - (3)
of outdoor PC board (A1P). ∗1
Is the relationship between
low voltage and VL
normal? ∗2
NO
NO
(VF139)
SI-05C.BOOK Page 304 Monday, November 6, 2000 4:13 PM
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