Troubleshooting by Indication on the Remote Controller
SiUS28-902_B
116
Service Diagnosis
3.21 Refrigerant Overcharged
Remote
Controller
Display
F6
Applicable
Models
RZR, RZQ
Method of Error
Detection
Excessive charging of refrigerant is detected by using the outdoor air temperature and heat
exchanger deicer temperature during check operation.
Error Decision
Conditions
When the amount of refrigerant, which is calculated by using the outdoor air temperature and
heat exchanging deicer temperature during check operation, exceeds the criteria.
Supposed
Causes
Refrigerant overcharge
Disconnection of outdoor air thermistor
Disconnection of heat exchanger deicer thermistor
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.161.
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.
Check the mo
u
nting condition
of the o
u
tdoor air temperat
u
re
thermistor and heat exchanger
deicer thermistor in the piping.
Remo
v
e the o
u
tdoor air
temperat
u
re thermistor and heat
exchanger deicer thermistor from
the o
u
tdoor
u
nit PCB and
meas
u
re resistance
w
ith a tester.
Rectify the o
v
ercharge of
refrigerant.
YES
N
O
N
O
Replace the thermistor.
Install the thermistor correctly.
YES
Are the a
b
o
v
e
thermistor installed on
pipes correctly?
Is the
characteristic of the
a
b
o
v
e thermistor
normal?
