Troubleshooting
Si33-105
174
Troubleshooting R407C PLUS Series Heat Recovery System
3.18 Outdoor Unit:
Abnormal Discharge Pipe Temperature
Remote
Controller
Display
F3
Supposed
Causes
!
Abnormal discharge pipe temperature
!
Defect of discharge pipe thermistor (R31T, R32T or R33T)
!
Defect of outdoor unit PC board
!
Discharge pipe thermistor wrong connection
!
Liquid injection solenoid valve wrong connection
Troubleshooting
(VF044)
Discharge pipe
temperature is 135˚C
or higher.
Is there
a wrong connection of the
injection solenoid valves Y3S,
Y6S and Y7S?
Is there
a wrong
connection of the
discharge pipe thermistor?
R31T (inverter side) to
X16A, R32T (standard
side) to X17A and R33T
(standard side) to
X21A for 24~30
class.
Are the
characteristics
of the discharge pipe
thermistor normal?
(R31T, R32T or
R33T) (For the
characteristics
table.)
Replace outdoor unit PC board A1P.
(or A3P for 24~30 class)
Connect correctly and turn on again.
Replace the discharge pipe thermistor.
NO
NO
NO
NO
Out of gas, compression defect, etc.
Defect of the refrigerant system.
YES
YES
YES
YES
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Summary of Contents for R407C PLUS
Page 1: ...System R407C PLUS Series Heat Recovery System Si33 105 Service Manual ...
Page 11: ...Introduction Si33 105 x ...
Page 41: ...Specifications Si33 105 30 Specifications R407C PLUS Series Heat Recovery System ...
Page 147: ...Test Operation Si33 105 136 Test Operation R407C PLUS Series Heat Recovery System ...
Page 263: ...Si33 105 iv Index ...
