Toshiba MMU-AP0152SH, Service Manual, Page: 38 / 119

38
No.
8
Outline of specifications
(1) The indoor unit which stops operation, thermostat is OFF,
or operates in FAN mode opens PMV of the indoor unit by
the specified opening degree when cooling refrigerant or oil
recovery signal is received from the outdoor unit.
(2) Drain pump of 4-way air discharge cassette type and
concealed duct type operate during recovery control mode.
Remarks
• Recovery operation is
usually executed every 2
hours.
Item
Recovery control
for cooling
refrigerant and oil
9
10
11
Recovery control
for heating
refrigerant and oil
Short intermittent
operation
compensation
control
Drain pump
control
The indoor unit which stops operation, thermostat is OFF, or
operates in FAN mode performs the following controls when
the heating refrigerant/Oil recovery signal is received from the
outdoor unit.
1) Opens PMV of the indoor unit by the specified opening
degree.
2) Stops the fan.
3) Only 4-way Air Discharge Cassette type air conditioner
rotates the indoor fan with intermittent operation for approx.
1 minute after recovery control.
4) Only 4-way Air Discharge Cassette type air conditioner
rotates the indoor fan with intermittent operation for approx.
1 minute after recovery control as the outdoor unit.
5) After recovery control, drain pump of 4-way air discharge
cassette type and cobcealed duct type will operate.
• In the indoor unit which
thermostat is OFF, or
operates in FAN mode,
“
” lamp goes on.
• Recovery operation is
usually executed every
1 hour.
(1) For 5 minutes after the operation has started, the operation
is continued even if entering thermostat-OFF condition.
(2) However, if the thermostat has been turned off by changing
the set up temp., the thermostat is OFF with even the
above condition. The protective control has priority.
(1) During “COOL” operation (including DRY operation), the
drain pump operates.
(2) While the drain pump operates, if the float switch works,
the drain pump continues operation and a check code is
displayed.
(3) While the drain pump stops, if the float switch works, turn
off the capacity demand command, stop the operation, and
operate the drain pump. If the float switch continues
operating for approx. 5 minutes, the operation stops and
the check code is displayed.
(4) In heating operation, if humidifier “provided” is judged,
compressor “ON”, compressor “ON”, fan “ON”, and MAX
(TC2, TCJ) > 33°C, the drain pump operates.
Check code [P10]
When CN70 is connected
or the item code 40 setup
data is 1, the setup
becomes humidifier
“provided”, and the drain
pump operates with the left
conditions.
12 Elimination of
remaining heat (1) When the air conditioner stops in the “HEAT” mode, drive
the indoor fan with “LOW” mode for approx. 30 seconds.
13 Auto flap control (1) When the louver signal has been received from the remote
controller, the louver operates if the indoor fan is operating.
(2) In 4-way Air Discharge Cassette type, the discharge louver
automatically directs downward if the operation stops.
(3) In 4-way Air Discharge Cassette type, the discharge louver
directs upward if the heating operation is being prepared.
14 Filter sign display
(None in wireless
type)
∗
Provided in the
separately laid
type
TCB-AX21E.
(1) The operation time of the indoor fan is integrated and
stored in memory, and the filter exchange signal is sent to
the remote controller to display on the remote controller
LCD after the specified time.
(2) When the filter reset signal is received form the remote
controller, time of the integrated timer is cleared. In this
time, if the specified time has passed, the measured time is
reset and LCD display disappears.