Panasonic CU-UE9HKE User Manual
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13. Protection control
13.1 Protection Control For All Operations
13.1.1
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.
13.1.2
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.
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.
13.1.3
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.
UE9HKE
UE12HKE
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.
13.1.4
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 90.0
, compressor will stop immediately.
Compressor restarts after three minutes if the temperature decreases to 85
13.1.5
Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated compressor
discharge temperature. The change of frequency is as below.
discharge temperature. The change of frequency is as below.