Protection Control; Protection Control For All Operations - Panasonic CS-E12JKKW-1 Service Manual

14.

Protection Control

14.1

Protection Control For All Operations

14.1.1 Restart Control (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.
14.1.2 30 Seconds Forced Operation
• 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.
14.1.3 Total Running Current Control
•
When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor
operation will be decreased.
•
If the running current does not exceed X value for 5 seconds, the frequency instructed will be increased.
•
However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3
minutes.
Model
Operation Mode X (A)
Cooling / Soft Dry (A) 5.26
Cooling / Soft Dry (B) 4.70
Heating 8.32
1. The first 30 minutes of cooling operation, (A) will be applied.
14.1.4 IPM (Power Transistor) Prevention Control
14.1.4.1 E12JK-1
•
Overheating Prevention Control
When the IPM temperature rises to 212°F, compressor operation will stop immediately.
o
Compressor operation restarts after 3 minutes the temperature decreases to 203°F.
o
If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking ("F96" is indicated).
o
•
DC Peak Current Control
When electric current to IPM exceeds set value of 18.5A, the compressor will stop operate. Then, operation
o
will restart after 3 minutes.
If the set value exceeds again more than 30 seconds after the compressor starts, the operation will restart
o
after 2 minutes.
E12JKK-1 E18JKK-1
Y (A) X (A)
14.98 8.74
14.98 7.71
14.98 10.71
Y (A)
14.96
14.96
14.96
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