SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
115
3.20 Discharge Pipe Temperature Control
Remote
Controller
Display
F3
Applicable
Models
RZR, RZQ
Method of Error
Detection
Abnormality is detected according to the temperature detected by the discharge pipe
temperature thermistor.
Error Decision
Conditions
When the discharge pipe temperature rises to an abnormally high level
When the discharge pipe temperature rises suddenly
Supposed
Causes
Defective discharge pipe temperature thermistor
Defective connection of discharge pipe temperature thermistor
Defective outdoor unit PCB
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.162.
Are the
characteristics of
the discharge pipe
thermistor normal?
(3.5
~
400K
W
)
Discharge
pipe temperat
u
re
is 24
8
°F or higher
w
hen
the
u
nit stops
b
y error.
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector or parts may
b
e damaged.
P
u
ll o
u
t the discharge pipe
thermistor from the o
u
tdoor
u
nit PCB, and then make
meas
u
rement of resistance
u
sing a m
u
ltiple meter.
Replace the o
u
tdoor
u
nit PCB
(A1P).
Replace the discharge pipe
thermistor.
N
O
N
O
Refrigerant shortage, compression
defect, etc. Defecti
v
e refrigerant
system.
YES
YES