SiSG121917E
Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis
154
Reference
Reference
7.13 High Pressure Control in Cooling
Error Code
F6
Outdoor Unit LED
Display
A
j
1
i
2
h
3
i
4
i
5
h
Method of Error
Detection
High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if
the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Error Decision
Conditions
The temperature sensed by the outdoor heat exchanger thermistor rises above about 65°C.
The error is cleared when the temperature drops below about 50°C.
Supposed
Causes
Installation space not large enough
Dirty outdoor heat exchanger
Defective outdoor fan motor
Defective stop valve
Defective electronic expansion valve or coil
Defective outdoor heat exchanger thermistor
Defective outdoor unit PCB
Troubleshooting
Check No.01
Refer to P.169
Check No.12
Refer to P.172
(R2041
8
)
Caution
Replace the o
u
tdoor fan
motor.
Reconnect the connector or
fan motor lead
w
ires.
Replace the stop
v
al
v
e.
Replace the o
u
tdoor heat
exchanger thermistor.
Replace the o
u
tdoor
u
nit
PCB (main PCB).
Replace the electronic
expansion
v
al
v
e or the coil.
Replace the o
u
tdoor
u
nit
PCB (main PCB).
Change the installation
location or direction.
Clean the o
u
tdoor heat
exchanger.
Check the installation space.
N
G
OK
OK
N
G
N
G
OK
OK
OK
N
G
N
G
Check No. 19
Check the o
u
tdoor fan.
Check No. 18
Check the discharge
press
u
re.
Check No. 12
Check the electronic
expansion
v
al
v
e.
Check No. 17
Check the installation
condition.
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
Check No. 01
Check the o
u
tdoor heat
exchanger thermistor.
