Defrost Detection And Release; Ct (Peak Current Cut-Off Control) - Panasonic CS-KE30NKU Technical & Service Manual

Dc inverter split system air conditioner
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Defrost detection and release

Reverse-Cycle Defrosting
Defrosting Sequence
Heating operation
Outdoor fan ON
4-way valve ON
Frost sensing
Defrost detection occurs in either of the following cases:
The temperature of the heat exchanger remains at
or below the L1 line for 3 minutes after the start of
HEAT operation.
The temperature of the heat exchanger remains at
or below the L2 line for 120 minutes after the start
of HEAT operation.
Outdoor heat
exchanger temp.
0
Ambient temp.
L2
L1
Frosting area
Reverse-cycle defrosting operation
Compressor
1 minute after it is stopped,
compressor is ON.
Outdoor fan
OFF
Indoor fan
OFF
4-way valve
OFF
Operation lamp
Repeatedly switches between red
and orange illumination.
Releasing of defrosting
°
°
Outdoor heating exchanger temp. is over 57.2
F (14
C).
Defrosting operation lasts 12 minutes (maximum).
2 minutes after it is stopped, compressor is ON.
4-way valve is ON. Outdoor fan is ON.
NOTE
If the air conditioner is turned off during the defrosting
cycle, it will continue defrosting and turn itself off after
defrosting is completed.

CT (Peak current cut-off control)

This function prevents the circuit breaker or fuse from operating
to open the circuit. This function works when electrical current
has increased due to an increase in the cooling / heating load,
or to a decrease in the power supply voltage. In these cases,
operation frequency is reduced or operation is interrupted auto-
matically to control the electrical current for operation.
When the cause of the increase in electrical current is rectified,
the system will resume operation in the original mode.
<
>
(A)
CS-KE30NKU
Cooling Dry
Heating
Peak current cut-off trips
25.0
Hz down
22.0
<
>
(A)
CS-KE36NKU
Cooling Dry
Heating
Peak current cut-off trips
25.0
Hz down
24.0
23.5
NOTE
Electrical current setting for COOL operation is
used during DEFROST operation.
Page 40

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