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SiME341909EA
Check
Part 6 Service Diagnosis
261
Reference
6. Check
6.1 High Pressure Check
CHECK 1
Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points.
CHECK 6
Refer to page 266.
Rise in high
pressure
Local
pressure
rise
High pipe
resistance
Stop valve closed
Bent or crushed pipe
Clogging of foreign
particles
←
Check to be sure the stop valve is open.
←
Conduct visual checks for pipe conditions.
←
Is there any temperature difference caused before
and after the filter or branch pipe?
Defective
control
Defective high pressure sensor
Defective outdoor unit main PCB
←
Are the voltage characteristics normal?
←
Is the pressure value checked with the Service Checker
corresponding to the measurement of the pressure sensor?
Defective
high
pressure
control
In cooling
High suction
air
temperature
of the
condenser
High suction
air temperature
of outdoor unit
Short circuit
High outdoor air temperature
←
Is the suction air temperature not more than
43
°
C?
←
Is the outdoor air temperature not more than
43
°
C?
Degradation
in condensing
capacity
Dirty condenser
Mixing of non-condensable gas
←
Is the heat exchanger clogged? (In cooling)
←
Is air or else mixed in the refrigerant system?
Decreased
fan airflow
rate
Decreased
fan
output
Defective fan
motor
←
Can the fan motor be rotated with hands?
Are the motor coil resistance and
insulation normal?
←
If a spare PCB is mounted, is the capacity
setting properly made?
Defective outdoor
unit main PCB
(Including
capacity setting)
High air
passage
resistance
Dirty filter
←
Is the air filter clogged?
Obstacle
←
Is there any obstacle in the air passage?
Excessive refrigerant charging
←
Refer to
CHECK 6
.
Summary of Contents for VRV X RXQ10ARYFK
Page 1: ...Service Manual Cooling Only 50 60 Hz RXQ6 48A N R Series SiME341909EA...
Page 289: ...SiME341909EA Wiring Diagrams Part 7 Appendix 283 RXQ10 12ARYFK 2D124184...
Page 290: ...Wiring Diagrams SiME341909EA 284 Part 7 Appendix RXQ14 16ARYFK 2D124183...
Page 295: ...SiME341909EA Wiring Diagrams Part 7 Appendix 289 FXMQ40 50 63 80 100ARV1 3D127112 04 59...