– 19 –
No.
9
10
11
12
Item
Recovery control
for heating
refrigerant (Oil)
Compensation
control for short
intermittent
operation
Drain pump
control
Display of filter
sign [
]
∗
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 heating
refrigerant (Oil) recovery signal from the outdoor unit.
1) Opens PMV of the indoor unit with a constant
opening degree.
2) Detects temperature of TC2 and then closes PMV.
1) For 3 minutes after start of operation, the opera-
tion 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) In cooling operation, this control anytime operates
the drain pump.
2) During operation of the drain pump, if the float
switch operates, the drain pump continuously
operates and a check code is issued.
3) During stop status of the drain pump, if the float
switch operates, the thermostat is forcedly off and
this control operates the drain pump.
After continuous operation of the float switch for
approx. 5 minutes, this control stops the operation
and a check code is issued.
1) The filter sign is displayed with LC by sending the
filter-reset signal to the remote controller when the
specified time (150H/2500H) elapsed as a result of
integration of the operation time of the indoor fan.
2) The integrated timer is cleared when the filter-reset
signal is received from the remote controller.
In this time, if the specified time elapsed, the
counted time is reset and the LC display is deleted.
Remarks
• The indoor unit which is
under thermo-OFF (COOL)
status or which operates in
[FAN] mode stops the indoor
fan and displays [READY ].
• 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 controller
side.
Check Code [P10]
[
FILTER] goes on.
Filter time
2500H
Summary of Contents for Carrier MMD- AP0074BH2UL
Page 90: ... 90 MMD AP0484BH2UL ...
