Panasonic CS-RE12JKE, Service Manual, Page: 36 / 51

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13. Protection control
13.1 Protection Control For All Operations
13.1.1 Time Delay Safety Control
ϥ
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.
ϥ This control is not applicable if the power supply is cut off and on again.
ϥ This phenomenon is to balance the pressure inside the refrigerant cycle.
13.1.2 30 Seconds Forced Control
ϥ 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.
ϥ 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.
RE9JKE RE12JKE RE15JKE
Operation mode
I
1
(A) I
1
(A) I
1
(A)
Cooling/ Soft Dry /Fan A* 5.03 6.35 8.98
Cooling/ Soft Dry /Fan B 4.89 6.22 8.00
Heating 4.75 6.22 9.31
*The first 30 minutes of cooling operation, A will be applied.
(For RE9JKE,RE12JKE) (RE15JKE)
13.1.4 IPM (Power transistor) Protection Control.
1. DC Peak Current Control
ϥ When electric current to IPM exceeds set value of DC17.3 1A, the compressor will stop. It will restart after
three minutes.
ϥ
If the set value is exceeded again within 30 seconds, the operation will restart after one minute.
ϥ If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.
ϥ
Error code [F99] will be displayed.
2. Overheating protection control
When the IPM temperature rises to 112 к , compressor will stop immediately.
Compressor restarts after three minutes if the temperature decreases to 97
к
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.
39
ć
39 ć
39
ć
38
ć
Outdoor temperature
112
ć
RE9/12JKE
112 ć
110 ć
100 ć
RE15JKE