Release Protective Control By Temperature Of Indoor Heat Exchanger; Drain Pump Contro; After-Heat Elimination - Toshiba RAS-M10U2MUVG-E Service Manual

Item
4. Release Freeze preventive control (Low temperature release)
protective 1) The cooling operation (including Dry operation) is performed as follows
control by based on the detected temperature of Tc sensor or Tcj sensor.
temperature When [J] zone is detected for 6 minutes (Following figure), the commanded
of indoor frequency is decreased from the real operation frequency.
heat After then the commanded frequency changes every 30 seconds while
exchanger operation is performed in [J] zone.
In [K] zone, time counting is interrupted and the operation is held.
When [ I ] zone is detected, the timer is cleared and the operation returns to
the normal operation.
If the commanded frequency becomes S0 because the operation continues
in [J] zone, the return temperature A is raised from 7˚C to 12˚C until [ I ] zone
is detected and the indoor fan operates with [L] mode.
High-temp. release control
1) The heating operation is performed as follows based on the detected
temperature of Tc sensor or Tcj sensor.
• When [M] zone is detected, the commanded frequency is decreased from
the real operation frequency. After then the commanded frequency
changes every 30 seconds while operation is performed in [M] zone.
• In [N] zone, the commanded frequency is held.
• When [L] zone is detected, the commanded frequency is returned to the
original value by approx. 6Hz every 60 seconds.
Setup at shipment
Control temp. (˚C)
A
53(51)
NOTE:
When the operation has started or when Tc or Tcj < 30˚C at start of the
operation or after operation start, temperature is controlled between values in
parentheses of A and B.
5. Drain pump 1) In cooling operation (including Dry operation), the drain pump is usually
control operated.
2) If the float switch works while drain pump drives, the compressor stops, the
drain pump continues the operation, and a check code is output.
3) If the float switch works while drain pump stops, the compressor stops and
the drain pump operates. If the float switch keeps operating for approx. 4
minutes, a check code is output.
4) The drain pump doesn't stop immediately to decrease the drain water in the
drain pan when the cooling operation (including Dry operation) was stopped
and drive the drain pump for five minutes.
6. After-heat When heating operation stops, in some cases, the indoor fan operates with [LL]
elimination for approx. 30 seconds.
Operation flow and applicable data, etc.
Tc
(˚C)
Tcj
7
I
5
Tc
Tcj
B
51(49)
– 33 –
A
K
J
(˚C)
M
A
N
B
L
Description
Same status as that
when "thermostat-OFF"
(status that the air
conditioner enters in the
room temp. monitor
mode when the
temperature reached the
setup temperature on the
remote controller)
Check code [0B]