-
58
-
4.13 Control and protection functions
(1) Frost prevention for indoor heat exchanger (During cooling or dehumidifying)
⽧ <I>
(a) Operating condition
After the indoor command speed is other than 0 rps for 9 minutes, when the indoor heat exchanger (Th
I-R1) is 2°C or lower
for 1minute continuously.
(b) Detail of operation
1) The indoor command speed is minimum rps for 5 minutes.
2) After 1) above, if the indoor heat exchanger is 2°C or lower, the speed is 0 rps.
3) After 1) above, if the indoor heat exchanger is more than 2°C, it returns normal operation.
4) After 2) above, if the indoor heat exchanger is 7°C or higher, it runs for 5 minutes at half of indoor command speed, then
it returns normal operation.
⽧ <II>
(a) Operating conditions (When all the conditions below are satisfied)
1 After the indoor command speed is other then 0 rps for 8 minutes, when the indoor heat exchanger (Th
I-R1) is 5°C or
lower.
2 The indoor command speed is more than minimum rps.
(b) Detail of operation
1) When indoor heat exchanger is 5°C or lower, the indoor command speed is reduced by 4 rps at each 20 seconds. The lower
limit speed is minimum rps.
2) When the indoor heat exchanger is in the range of 5~7°C, if the command speed is been maintained and the operation has
continued for more than 20 seconds at same speed, it returns to the normal operation.
(c) Reset condition: When the indoor heat exchanger (Th
I-R1) is 7°C or higher.
(2) Drain water overflow prevention function (STM, SRRM type only)
(a) Operation condition: Float switch detects drain water for more than 3 seconds.
(b) Detail of operation: Sets the indoor command speed to 0 rps, stops the indoor fan motor, and only lets the drain motor run
for 5 minutes. After this operation finishes, if the float switch detects drain water, it will display an
error and stop operation.
(c) Rest conditions: After the drain motor run for 5 minutes, the float switch cannot detect water.
Indoor heat exchanger temp. (°C)
( )
To Next Page
Loading...
Need help?
General
