15
9. Test run
• For description of each check code, refer to the following table.
1
Check code
Symptom
Remark
P1
Intake sensor error
P2, P9
Pipe (Liquid or 2-phase pipe) sensor error
E6, E7
Indoor/outdoor unit communication error
P4
Drain sensor error
P5
Drain pump error
PA
Forced compressor error
P6
Freezing/Overheating safeguard operation
EE
Communication error between indoor and outdoor units
P8
Pipe temperature error
E4
Remote controller signal receiving error
Fb
Indoor unit control system error (memory error, etc.)
E0, E3
Remote controller transmission error
E1, E2
Remote controller control board error
E9
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
UP
Compressor overcurrent interruption
U3, U4
Open/short of outdoor unit thermistors
UF
Compressor overcurrent interruption (When compressor locked)
U2
Abnormal high discharging temperature/49C worked/insufficient refrigerant
U1, Ud
Abnormal high pressure (63H worked)/Overheating safeguard operation
U5
Abnormal temperature of heat sink
U8
Outdoor unit fan safeguard stop
U6
Compressor overcurrent interruption/Abnormal of power module
U7
Abnormality of super heat due to low discharge temperature
U9, UH
Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/
Current sensor error
Others
Other errors (Refer to the technical manual for the outdoor unit.)
• On wired remote controller
1
Check code displayed in the LCD.
10.Maintenance
10.1. Gas charge
[Fig. 10-1] (P.7)
A
Indoor unit
B
Union
C
Liquid pipe
D
Gas pipe
E
Stop valve
F
Outdoor unit
G
Refrigerant gas cylinder operating valve
H
Refrigerant gas cylinder for R410A with siphon
I
Refrigerant (liquid)
J
Electronic scale for refrigerant charging
K
Charge hose (for R410A)
L
Gauge manifold valve (for R410A)
M
Service port
1. Connect gas cylinder to the service port of stop valve (3-way).
2. Execute air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3. Replenish specified amount of refrigerant, while running the air conditioner
for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerating
cycle.
Caution:
• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installa-
tion, reinstallation, or repairs to the refrigerant circuit.
• For additional charging, charge the refrigerant from liquid phase of the gas
cylinder.
If the refrigerant is charged from the gas phase, composition change may
occur in the refrigerant inside the cylinder and the outdoor unit. In this case,
ability of the refrigerating cycle decreases or normal operation can be impos-
sible. However, charging the liquid refrigerant all at once may cause the com-
pressor to be locked. Thus, charge the refrigerant slowly.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm
water (under 104 °F [40 °C]) during cold season. But never use naked fire or steam.
For details, check the LED display
of the outdoor controller board.
9.3. Self-check
9.3.1. Wired remote controller
1
Turn on the power.
2
Press the [CHECK] button twice.
3
Set refrigerant address with [TEMP] button if system control is used.
4
Press the [ON/OFF] button to stop the self-check.
[Fig. 9-2] (P.7)
A
CHECK button
B
Refrigerant address
C
TEMP. button
D
IC:
Indoor unit
OC: Outdoor unit
E
Check code
