Toshiba MMU-AP0072H2UL-1 Service Manual page 41

No. Item
8 Recovery control for
cooling oil
(Refrigerant)
9 Recovery control for
heating refrigerant
(Oil)
10 Compensation
control for short
intermittent operation
11 Elimination of
retained heat
12 Display of filter sign
[ ]
(Not provided to the
wireless type)
∗ Separately set type
TCB-AX21UL is
prepared.
Outline of specifications
The indoor unit which is under STOP/Thermo-OFF
status or which operates in [FAN] mode performs the
following controls when it received the cooling oil
(Refrigerant) recovery signal from the outdoor unit.
1) Opens PMV of the indoor unit with a constant
opening degree.
2) Operates the indoor fan for approx. 3 minutes
during recovery control and after finish of control.
The indoor unit which is under STOP/Thermo-OFF
status or which operates in [FAN] mode performs the
following controls when it received the heating refrigerant
(Oil) recovery signal from the outdoor unit.
1) Opens PMV of the indoor unit with a constant
opening degree.
2) Stop the indoor fan.
1) For 3 minutes after start of operation, the operation
is forcedly continued even if the unit enters in
Thermo-OFF condition.
2) However the thermostat is OFF giving prior to
COOL/HEAT selection, ready for operation and
protective control.
1) When the unit stopped from [HEAT] operation, the
indoor fan operates with [L] for approx. 30 seconds.
1) The filter sign is displayed with LC by sending the
filter-reset signal to the remote control when the
specified time (150H) elapsed as a result of integra-
tion of the operation time of the indoor fan.
2) The integrated timer is cleared when the filter-reset
signal is received from the remote control.
In this time, if the specified time elapsed, the counted
time is reset and the LC display is deleted.
41
Remarks
• Recovery operation is
usually performed every
2 hours 5 minutes.
• The indoor unit which is
under thermo-OFF
(COOL) status or which
operates in [FAN] mode
stops the indoor fan and
displays [ ].
• Recovery operation is
usually performed every
1 hour.
(When there is even 1
indoor unit which the
thermo unit is off)
Usually the priority is given
to 5 minutes at outdoor
control side.
[ FILTER] goes on.