Air Purifying Control [Detection Of Abnormality]; Discharge Temperature Control - Toshiba RAS-4M23SAV-E Service Manual

Item Operation flow and applicable data, etc.

12. Air purifying control [Detection of abnormality]

Air purifying operation
PURE lamp ON
Air purifier power ON ∗
Air purifier
YES
power estimates
Error is detected
Filter lamp (1Hz) ON
Air purifier power OFF
detected by
5 times or more
YES
Air purifier power OFF
Filter lamp (1Hz) ON
1

Reset by RESET button.
‚
Reset by RESET button or by the stop direction
from the remote controller.
* When the breaker is turned [ON] or RESET
button is pushed while the FILTER indicator is
turned on, the air purifier is not turned on until
the integrated operation time of the indoor fan
exceeds 1 hour after operation start.
It is the safety measures considering an incom-
plete drain when electric dust collector has been
cleaned with water.

13. Discharge temperature control

Td value
Judges as an error and stops the compressor.
120°C
Reduce the compressor speed.
115°C
Reduce slowly compressor speed.
111°C
Keeps the compressor speed.
108°C
If the operation is performed with lower speed than one
commanded by the serial signal, speed is slowly raised
up to the commanded speed.
101°C
Operates with speed commanded by the serial signal.
1000H
NO
NO
YES
Error was
NO
Approx. 10 minutes
passed from the error input
was detected.
YES
2
Control operation
1. Purpose
The air purifying control function is to
alert the user to trouble in the ionizing or
air purifying operation.
2. Description
Trouble is determined to have occurred
(indicated by the FILTER indicator) in the
following four cases.
1) When a count of 1000H has been
reached on the timer
2) When the panel switch has been set to
OFF by the opening of the air inlet
grile, etc.
3) When an abnormal discharge caused
by a symptom such as the build-up of
dirt has been detected while the air
purifier is ON
4) When the electric dust collector has
not been installed correctly
* Trouble case (2) or (3) is deemed to
3. Operation
The sequence that FILTER indicator is
NO
turned on are described in the left
flowchart.
1) When 1000H timer counts up, the
FILTER indicator keeps lighting even if
the operation is stopped by the remote
controller.
The timer is stored in memory of the
microcomputer, and the operation time
is cleared by filter RESET button on
the indoor unit.
(FILTER indicator goes off.)
2) If the air purifying error input was
detected by 5 times or under, turn on
the purifier again approx. 10 minutes
after and judge it again.
If the air purifying error input was
detected by 5 times or more, deter-
mine the error and turn on the Filter
lamp.
1. Purpose
This function detects error on the
refrigerating cycle or error on the com-
pressor, and performs protective control.
2. Operation
• Control of the compressor speed
The speed control is performed as
described in the left table based upon
the discharge temperature.
– 53 –
Description
have occurred when the action
concerned continues for more than
one second.