Toshiba MMD-AP0481HF2UL Service Manual page 26

No. Item
10 Cooling oil
(Refrigerant)
recovery control
11 Heating
refrigerant (oil)
recovery control
12 Short intermittent
operation compen-
sation control
13 Remained heat
elimination
14 Filter sign display
15 [Operation stand-by]
[Heating stand-by]
display
Outline of specifications
When the indoor air conditioner which stops, in which
thermostat is off, or which operates [FAN] performs the
following control by receiving the cooling oil (refrigerant)
recovery signal from the outdoor unit.
Opens PMV of the indoor air conditioner with certain
opening angle.
When the indoor air conditioner which stops, in which
thermostat is off, or which operates [FAN] performs the
following control by receiving the heating refrigerant (oil)
recovery signal from the outdoor unit.
Opens PMV of the indoor air conditioner with certain
opening angle.
Detects temperature of TC2 and closes PMV.
1) For 5 minutes after start of operation, the operation
continues forcedly even if entering in thermostat OFF
condition.
(2) However cooling/heating selection, operation ready and
protective control are given with priority, and thermostat
is turned off.
1) If stopped from [HEAT] operation, the indoor fan operates
for approx. 30 seconds.
1) Estimates operation time of the indoor fan, sends the
filter exchange signal to remote control when the
specified time (2500H) passed and then displays it on
LCD.
2) Clears the estimate timer when received filter reset
signal from remote control.
In this time, if the specified time has passed, resets the
measured time and erases the LCD display.
<Ready stand-by>: displa displayed on the remote control.
1) When the following check codes are indicated.
• There is an indoor air conditioner which detected
indoor overflow [P10].
• There is an indoor air conditioner which detected
interlock warning [L30].
2) During forced thermo OFF.
• [COOL] operation is unavailable because other
indoor air conditioner operates in [HEAT] mode.
• COOL priority setting (Outdoor I/F P .C. board
SW11-bit1 is ON) is made, and other indoor air
conditioner operates in [COOL/DRY] mode.
Therefore [HEAT] operation is unavailable.
3) When fan stops by forced fan OFF control.
4) The above indoor air conditioners unavailable to
operate enter in [Standby] status with thermo-OFF.
<HEAT stand-by>: displayed on the remote control.
1) Defrosting
• Indoor fan stops because unit is under defrost
operation.
– 26 –
Remarks
• Recovery
operation is
usually performed
every 2 hours.
• Recovery
operation is
usually performed
every 1 hour.
• [Operation stand-by]
display
• [Heating stand-by]
display