Toyotomi MTN-MTG 256DV Service Manual page 29

9.12 Action of outdoor fan
9.12.1 Outdoor fan is Brushless DC (BLDC) fan.
9.12.2 Outdoor fan speed can be selected among high fan, medium fan and low fan automatically according to
running mode and outdoor ambient temperature.
9.12.3 Action of outdoor fan in cooling & drying mode(including cooling in auto & forced mode).
(T4 is outdoor ambient temperature.)
9.12.4 Action of outdoor fan in low ambient cooling function.
Low ambient cooling function is optional for these models.
The unit will get into low ambient cooling function automatically when T4 15
Outdoor fan will be controlled according to T3 as below.
The unit will quit low ambient cooling function when:
1 T4>15
re-judge the entering condition when T4 15
2 Compressor stops. (Re- judge the entering condition when compressor restarts.)
9.12.5 Outdoor fan speed will be fixed at DC_FAN_COOL_RAT_SPD_ADD when the unit is on rating cooling
capacity test. Outdoor fan speed will be fixed at DC_FAN_HEAT_RAT_SPD_ADD when the unit is on rating heating
T4
DC_FAN_HI_SPD_ADD
28
26
DC_FAN_MID_SPD_ADD
22
20
DC_FAN_LOW_SPD_ADD
T3
Outdoor fan is controller according to T4.
20
0
and T3 20 for 1 minute (Outdoor fan will run during this 1 minute.) The unit will
1 minute later.
Outdoor fan stops.
and the compressor is running.
31