Toshiba MMD-AP0726HP-UL Service Manual page 18

NO. Item
Cooling oil While the outdoor unit is recovering cooling oil (refrigerant), the indoor
(refrigerant) units perform the following control tasks:
recovery control [common for operational (cooling thermostat ON / thermostat OFF / FAN),
as well as nonoperational indoor units]
8
Heating While the outdoor unit is recovering heating refrigerant (oil), the indoor
refrigerant (oil) units perform the following control tasks:
recovery
control
[Indoor units operating in heating thermo ON / OFF state]
[Indoor units operating in FAN mode]
9
remote control.
[Non-operational indoor units]
Defrosting While the outdoor unit is engaged in defrosting control, the indoor units
perform the following control tasks:
control
[Indoor units operating in heating thermo ON / OFF state]
[Indoor units operating in FAN mode]
10
[Non-operational indoor units]
Short 1. For 5 minutes after startup, the system is forced to continue operating
intermittent
operation
11
2. However, priority is given to cooling / heating selection, operation
compensation
control
Elimination of 1. When the air conditioner is turned off after engaging in heating operation,
12
residual heat
Specification outline
1) Open the indoor PMV to a certain degree.
2) Engage in recovery control for a specified period of time and return
to normal cooling operation at the end of this period upon
terminating the control.
3) Operate the drain pump throughout the recovery control period and
for about 1 minute after it.
1) Open the indoor PMV to a certain degree.
2) Control the indoor fan according to the operation mode.
Let the indoor fan continue operating, but turn it off if the temperature
of the indoor heat exchanger drops.
Turn off the indoor fan and display "HEATING STANDBY
Keep the indoor fan turned off.
3) Terminate the recovery operation depending on the TC2
temperature reading.
The timing of termination is determined by each indoor unit.
4) Operate the indoor fan and drain pump for about 1 minute after the
termination of the recovery operation. (Applicable to compact 4-way
cassette type and 1- way cassette type)
1) Open the indoor PMV to a certain degree.
2) Control the indoor fan according to the operation mode.
Let the indoor fan continue operating for a while, but turn it off as the
temperature of the indoor heat exchanger drops.
Let the indoor fan continue operating.
Keep the indoor fan turned off.
3) As defrosting control comes to an end, it gives way to heating
refrigerant (oil) recovery control.
(For control details, see "9. Heating refrigerant (oil) recovery control" above.)
even if it reaches the thermo OFF region.
standby, and protective control, so that there is no overriding of
thermo OFF in these cases.
the indoor fan is operated for about 30 seconds in "breeze" mode.
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Remarks
• Recovery operation
normally takes
place roughly every
2 hours.
• The opening
position of the
indoor PMV
depending on the
type and capacity
of the indoor unit.
• Recovery
operation
normally takes
place roughly
every hour.
• The opening
position of the
indoor PMV
depending on the
" on the
type and capacity
of the indoor unit.
• For defrosting
commencement
conditions, see 5
Control Outline "7.
Defrosting control
(reverse defrosting
method)" in SMMS-e
Outdoor Unit
Service Manual
SVM-16039 above.
• The opening
position of the
indoor PMV
depending on the
type and capacity
of the indoor unit.