Panasonic CS-E18SD3UAW service manual - Page 55

Protection Control

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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 Cool B C Heating E9SD3UA X (A) Y (A) 3.89 15.01 3.28 15.01 3.28 15.01 5.27 15.01 E12SD3UA X (A) Y (A) 6.55 15.01 6.10 15.01 6.10 15.01 7.05 15.01 E18SD3UA X (A) Y (A) 12.39 19.30 11.43 19.30 10.05 19.30 12.86 19.30 4 The first 30 minutes of cooling operation, (A) will be applied. 109.4ºF (C) 102.2ºF (B) (A) Outdoor air temperature 107.6ºF 100.4ºF 55

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55
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.
E9SD3UA
E12SD3UA
E18SD3UA
Operation mode
X (A)
Y (A)
X (A)
Y (A)
X (A)
Y (A)
Cool
A
3.89
15.01
6.55
15.01
12.39
19.30
B
3.28
15.01
6.10
15.01
11.43
19.30
C
3.28
15.01
6.10
15.01
10.05
19.30
Heating
5.27
15.01
7.05
15.01
12.86
19.30
4
The first 30 minutes of cooling operation, (A) will be applied.
107.6ºF
100.4ºF
102.2ºF
109.4ºF
(C)
(B)
(A)
Outdoor air temperature