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11.Maintenance
11.1. Gas charge
[Fig. 11-1] (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 40 °C [104 °F]) during cold season. But never use naked fire or steam.
10.Easy maintenance function (For wired remote controller only)
(1) Press the
TEST
button for 3 seconds to
activate the maintenance mode.
(2) Press the TEMP.
buttons to set the refrigerant address.
MAINTENANCE
(3) Select the data you want to display.
MENU
ON/OFF
Compressor
information
COMP ON
x10 HOURS
COMP ON
x100 TIMES
COMP ON
CURRENT (A)
Cumulative
operation time
ON/OFF
number
Operation
current
Display
Display
Display
OUTDOOR UNIT
H•EXC. TEMP
OUTDOOR UNIT
OUTLET TEMP
OUTDOOR UNIT
OUTDOOR TEMP
Heat exchanger
temperature
Comp discharge
temperature
Outdoor ambient
temperature
Display
Outdoor unit
information
INDOOR UNIT
INLET TEMP
INDOOR UNIT
H•EXC. TEMP
INDOOR UNIT
FILTER USE H
Indoor room
temperature
Heat exchanger
temperature
Filter operation
time
Display
Indoor unit
information
* The filter operation time displayed is the number of hours the filter has been
used since the filter reset was performed.
(4) Press the
FILTER
button.
(5) The data is displayed in
.
(Airflow temperature display example)
Blinking
W aiting for
response
Approx.
10 sec.
* Repeat steps (2) to (5) to check another data.
(6) Press the
TEST
button for 3 seconds or press the
ON/OFF
button to
deactivate the maintenance mode.
Stable operation
Using the maintenance mode, the operation frequency can be fixed and the op-
eration can be stabilized. If the air conditioner is stopped, use the following pro-
cedure to start this operation.
COOL
STABLE MODE
HEAT
STABLE MODE
STABLE MODE
CANCEL
Stable cooling
operation
Stable heating
operation
Stable operation
cancellation
Display
Press the
MODE
button to select the operation mode.
Press the
FILTER
button.
Waiting for
stable operation
Display
Stable
operation
10-20 min.
* You can check the data using steps (3) to (5) of the maintenance mode opera-
tion procedures while waiting for the stable operation.
Display
PAR-21MAA
B
B
C
C
C
D
D
A
A
A
A
A
A
Display example (Comp discharge temperature 147°F)
By using the maintenance mode, you can display many types of maintenance data
on the wired remote controller such as the heat exchanger temperature and com-
pressor current consumption for the indoor and outdoor units.
This function can be used whether the air conditioner is operating or not.
During air conditioner operation, data can be checked during either normal opera-
tion or maintenance mode stable operation.
* This function cannot be used during the test run.
* The availability of this function depends on the connecting outdoor unit. Refer to the
brochures.
Maintenance mode operation procedures
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