Mitsubishi Electric LGF-100GX-E Handbook page 16

Bypass ventilation prohibited
When the conditions described below are applicable, the ventilation mode will be fi xed at Lossnay ventila-
tion. When bypass ventilation has been set from the remote controller or the system controller, damper
operation will be set to Lossnay ventilation, even though bypass ventilation is displayed on the ventilation
mode display.
When the outdoor temperature is 8 °C or lower. ( Product condensation prevention )
When bypass ventilation prohibition has been set under this condition, the prohibition will be cancelled
when the outdoor temperature goes from a temperature of less than 10 °C to one higher than 10 °C.
When there is an outdoor temperature ( Outdoor Air ) thermistor fault.
When, in the automatic ventilation mode, there is an outdoor temperature ( Outdoor Air ) or indoor temper-
ature ( Return Air ) thermistor fault.
When Lossnay is set to the automatic ventilation mode and interlocked with Mr.Slim or City Multi indoor
units set to the fan operation mode.
Damper operation
The damper is controlled on a 30-second cycle. Accordingly, a delay of 30 seconds maximum may be gen-
erated from ventilation mode switching to damper operation.
Automatic ventilation algorithm temperature map
Ventilation mode switching of Lossnay ventilation/Bypass ventilation in the automatic ventilation mode is in
accordance with the following map.
a. Systems interlocked with Mr. Slim and City Multi indoor units
The map will differ depending on the operation mode that has been set with the A-control remote control-
ler or the K-control remote controller for Mr. Slim, or the MA remote controller or the ME remote controller
for City Multi indoor units. There will be switching to the ventilation mode in conjunction with the set tem-
perature of the air conditioner remote controller. Note that the "b" map will be followed while Mr. Slim and
City Multi indoor units are stopped.
40
Lossnay
Ventilation
35
30
Remote controller
Set temperature
25
20
15
10
Bypass ventilation
Prohibition temperature 8°C
5
0
0 5 10
Lossnay ventilation area
Bypass ventilation area
Undetermined area
When operation starts under this condition, Lossnay ventilation will be activated.
When this condition is reached after operation starts, the current ventilation mode is maintained.
Cooling mode
Undetermined area
Bypass
Ventilation
15 20 25 30
Indoor temperature °C
40
35
Ventilation
30
25
Undetermined area
20
15
10
Lossnay
5
Ventilation
0
35 40
0
─ 16 ─
Heating mode
Undetermined area
Bypass
Remote controller
Set temperature
5 10 15 20 25
Indoor temperature °C
Bypass
Ventilation
4°C
30 35 40