Protection Control; Protection Control For All Operations; Seconds Forced Operation; Total Running Current Control - Panasonic CS-E9SD3UAW Service Manual

13. Protection Control

13.1 Protection Control For All Operations

13.1.1 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.
13.1.2

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.
13.1.3

Total Running Current Control

1 When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor
operation will be decreased.
2 If the running current does not exceed X value for five seconds, the frequency instructed will be increased.
3 However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for
3 minutes.
Operation mode
A
B
Cool
C
Heating
4 The first 30 minutes of cooling operation, (A) will be applied.
E9SD3UA
X (A) Y (A)
3.89 15.01
3.28 15.01
3.28 15.01
5.27 15.01
109.4ºF
102.2ºF
Outdoor air temperature
E12SD3UA
X (A) Y (A)
6.55 15.01
6.10 15.01
6.10 15.01
7.05 15.01
(C)
(B)
107.6ºF
100.4ºF
(A)
55
E18SD3UA
X (A) Y (A)
12.39 19.30
11.43 19.30
10.05 19.30
12.86 19.30