Outdoor Unit: Abnormal Discharge Pipe Temperature - Daikin VRV R-407C PLUS Series Service Manual

Troubleshooting

3.18 Outdoor Unit: Abnormal Discharge Pipe Temperature

F3
Remote Controller
Display
Supposed Causes
Troubleshooting
140
Abnormal discharge pipe temperature
Defect of discharge pipe thermistor (5K: R3T 8K, 10K: R3-1T, R3-2T)
Defect of outdoor unit PC board
Discharge pipe thermistor wrong connection
Liquid injection solenoid valve wrong connection
Discharge pipe
temperature is 135˚C
or higher.
NO
Are
the characteristics
of the discharge pipe
thermistor normal?
(R3-1T, R3-2T or
R3-11T~13T) (For the
characteristics
table.)
YES
YES
Is there
a wrong
connection of the
discharge pipe thermistor?
R3-1(11)T (inverter side)
X16A R3-2(12)T (standard
side) X17A and R3-13T
(standard side)
X21A for 24~30
class.
NO
Is there
a wrong connection of the
injection solenoid valves
Y3S, Y4S and Y5S?
NO
NO
YES
YES
Connect correctly and turn on again.
Out of gas, compression defect, etc.
Defect of the refrigerant system.
Replace the discharge pipe thermistor.
Replace outdoor unit PC board A1P.
(or A3P for 24~30 class)
Troubleshooting R-407C PLUS Series
SiE 00-07
(VF044)