NO. Item Specification outline Remarks
Heating
refrigerant (oil)
recovery
control
Short
intermittent
operation
compensation
control
Elimination of
residual heat
While the outdoor unit is recovering heating refrigerant (oil), the indoor
units perform the following control tasks:
1)Open the indoor PMV to a certain degree.
2)Control the indoor fan according to the operation mode.
[Indoor units operating in heating thermostat ON / OFF state]
Let the indoor fan continue operating, but turn it off if the temperature
of the indoor heat exchanger drops.
[Indoor units operating in FAN mode]
Turn off the indoor fan and display “HEATING STANDBY
” on the
remote controller.
[Non-operational indoor units]
Keep the indoor fan turned off.
• Recovery
operation normally
takes place
roughly every hour.
• The opening
position of the
indoor PMV
depending on the
type and capacity
of the indoor unit.
10
11
12
1.For 5 minutes after startup, the system is forced to continue operating
even if it reaches the thermostat OFF region. (For TA and DDC type.
TF type is 18 minutes)
2.However, priority is given to cooling / heating selection, operation
standby, and protective control, so that there is no overriding of
thermostat OFF in these cases.
13
1. When the air conditioner is turned off after engaging in heating operation,
the indoor fan is operated for about 30 seconds in “breeze” mode.
Operation
standby
Heating standby
<Operation standby> .......... Displayed on remote controller
1.When any of the check codes listed below is displayed
• “P05” - Detection of an open phase in the power supply
wiring
• “P10” - Detection of “Safety contact
is open” in at least one indoor unit
• “L30” - Detection of “External trouble Input (terminal DI2 / *DI2)” in at
least one indoor unit
2.Forced thermostat OFF
• “COOL / DRY” operation is unavailable because at least one indoor
unit is operating in “HEAT” mode.
• “HEAT” operation is unavailable because at least one indoor unit is
operating in
“COOL / DRY” mode under priority cooling setting (External trouble
Input (terminal DI2 / *DI2)).
3.All indoor units not able to engage in any of the above operations
stand by in thermostat OFF state.
4.The indoor fan has been turned off because the system is engaged in
a heat refrigerant (oil) recovery operation.
<Heating standby> .......... Displayed on remote controller
When stopping the fan to prevent the blowing of the cooled air when the
heating operation is started or operated.
• “OPERATION
STANDBY
”
displayed
No display
provided on
wireless remote
controller
• “HEATING
STANDBY
”
displayed
Note)
For details, refer to the outdoor unit Service manual.
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