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g)
If the heating thermostat is turned OFF or it is changed to other operation mode (including Fan OFF), this control
stops and then it returns to the operating state.
5)
If "Fan OFF" is selected, the fan on the unit on which the thermostat has been turned OFF is turned OFF. The fan on the
unit on which the thermostat has been turned OFF is turned OFF also when the remote controller sensor is effective.
(i)
Filter sign
As the operation time (Total ON time of ON/OFF switch) accumulates to 180 hours (1), "FILTER CLEANING" is displayed
on the remote controller. (This is displayed when the unit is in trouble and under the centralized control, regardless of ON/OFF)
Note (1) T ime setting for the filter sign can be made as shown below using the indoor function of wired remote controller "FILTER SIGN SET". (It is set at 1 at the
shipping from factory.)
Filter sign setting
TYPE 1
TYPE 2
TYPE 3
TYPE 4
(2) After the setting time has elapsed, the "FILTER CLEANING" is displayed and, after operating for 24 hours further (counted also during the stop), the
unit stops.
(j)
Compressor inching prevention control
1)
3-minute timer
When the compressor has been stopped by the thermostat, remote controller operation switch or anomalous condition,
its restart will be inhibited for 3 minutes. However, the 3-minute timer is invalidated at the power on the electric power
source for the unit.
2)
3-minute forced operation timer
• Compressor will not stop for 3 minutes after the compressor ON. However, it stops immediately when the unit is
stopped by means of the ON/OFF switch or by when the thermister turned OFF the change of operation mode.
• If the thermostat is turned OFF during the forced operation control of heating compressor, the louver position (with the
auto swing) is returned to the level position.
Note (1) The compressor stops when it has entered the protective control.
(k)
Indoor heat exchanger anti-frost (Frost protection)
(1)
Forced compressor OFF
1)
If the indoor heat exchanger (ThI-R1, -R2) detects the set temperature during "Cooling" or "Dehumidifying"
operation, the compressor is turned "OFF".
Forced
compressor OFF
Indoor heat exchanger sensor temperature (℃)
2)
Forced compressor OFF control of the anti-frost protection control is not operable for 4 minutes after the compressor
OFF. If the indoor heat exchanger sensor (ThI-R1, -R2) detects temperatures higher than the forced compressor OFF
temperature (1.0°C) after 4 minutes have elapsed from the compressor ON, the detection starts from the state that the
compressor can be turned ON.
3)
If the indoor heat exchanger sensor (ThI-R1 or -R2) detects temperatures lower than the forced compressor OFF
temperature (1.0°C) for 5 minutes continuously after 4 minutes have elapsed from the compressor ON, the compressor
is turned OFF forcibly. If temperatures of the indoor heat exchanger sensors (ThI-R1, -R2) enter in the range that the
compressor can be turned ON, the compressor is turned ON.
4)
"Anti-frost" signal is sent to the outdoor unit.
5)
The forced compressor OFF temperature can be changed with the frost protection temperature of the wired remote
controller indoor function setting.
• Temperature – Low: 1.0°C (Factory default)
• Temperature – High: 2.5°C
(2)
Indoor fan control during frost protection control
When the frost protection control starts during cooling or dehumidifying operation, the indoor fan control is changed as
follows.
Setting time: 180 hrs (Factory default)
Setting time: 600 hrs
Setting time: 1,000 hrs
Setting time: 1,000 hrs (Unit stop)
5-min timer
ON
1.0
10
Function
(2)
Temperature drop
Temperature rise
92
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'11 • PAC-T-160
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Table of Contents
Troubleshooting
