Datasheet

31
12. Protection control
12.1 Protection Control for All Operations
12.1.1 Time Delay Safety Control
● The Compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on
again by pressing OFF/ON button at remote control within this period.
● This control is not applicable if the power supply is cut off and on again.
● This phenomenon is to balance the pressure inside the refrigerant cycle.
12.1.2 30 Seconds Forced Control
● Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation
although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the
OFF/ON button at the remote control is permitted or the Auto OFF/ON button at indoor unit.
● The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a
full cycle and return back to the outdoor unit.
12.1.3 Total running current control
1. If the outdoor unit total running current is detected exceeding I
1
(A), the frequency instructed for compressor
operation will be decreased.
2. If the running current does not exceed I
1
(A) for 5 seconds, the frequency instructed will be increased.
UE9JKE UE12JKE
Operation mode
I
1
(A) I
1
(A)
Cooling/ Soft Dry /Fan A* 5.8 7.4
Cooling/ Soft Dry /Fan B 5.6 7.3
Heating 7.01 8.05
*The first 30 minutes of cooling operation, A will be applied.
12.1.4 IPM (Power transistor) Protection Control.
1. DC Peak Current Control
● When electric current to IPM exceeds set value of DC17.3 1A, the compressor will stop. It will restart after
three minutes.
● If the set value is exceeded again within 30 seconds, the operation will restart after one minute.
● If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.
● Error code [F99] will be displayed.
2. Overheating protection control
When the IPM temperature rises to 90 ℃ , compressor will stop immediately.
Compressor restarts after three minutes if the temperature decreases to 97℃
12.1.5 Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated compressor discharge temperature. The change of
frequency is as below.
Outdoor temperature
112 ℃
110 ℃
100 ℃