Panasonic CS-E24CKE / CU-E24CKE Service Manual ▷ View online
3. Ionizer operation status is not memorised by micon. After OFF, when operation is “ON” again, air conditioner operates
without ionizer operation.
c. Timer during ionizer operation
Refer to case study in next page for detail.
8.1.18.1. Ionizer Problem Detection Control
i. Purpose
To inform user of ionizer problems and detection.
ii. Two types of problem detection control:
Control
Detection Method
Protection
Recovery
ERROR
PROTECTION
PROTECTION
(i) Actual ion: ON
(i) Actual ion ON for 10s & OFF for
30 min. continuously for 24 times
(approx. 11 hr. 30 min.)
(approx. 11 hr. 30 min.)
(i) Actual ion is permanently OFF & ion
LED is blinking.
(i) Press ON/OFF button
to OFF
(ii) ion feedback signal:
0V
(ii) Within 24 counts, if anytime
CONDITION becomes false then
count is cleared.
count is cleared.
(ii) Press remote control ion button for
a) ON: Ion LED blink & buzzer = beep
b) OFF: Ion LED OFF & buzzer = beep
b) OFF: Ion LED OFF & buzzer = beep
(ii)
(iii)
Reset power
Off by force operation
BREAKDOWN
PROTECTION
PROTECTION
(i)
(ii)
Actual ion: OFF
ion feedback signal:
5V
5V
(i) Actual ion OFF
2s
(i)
Case 1: During Air-Con. ON.
Air-Cond OFF with abnormal no. H26 is
activated with timer LED is blinking
permanently.
Air-Cond OFF with abnormal no. H26 is
activated with timer LED is blinking
permanently.
(i) When anytime
CONDITION becomes
false.
false.
(i)
Case 2: During Air-Con. OFF.
Abnormal no. H26 is activated with
timer LED is blinking permanently for
both cases 1 & 2.
Abnormal no. H26 is activated with
timer LED is blinking permanently for
both cases 1 & 2.
(ii) Once recovered, ion &
Timer LED stops
blinking permanently.
blinking permanently.
(ii) Press remote control ion button for
a) ON: Ion LED blink
b) OFF: Ion LED OFF
b) OFF: Ion LED OFF
(iii) Main power reset.
(iii) Press any remote control button to
a) ON: Buzzer = beep beep beep beep
b) OFF: Buzzer = beep beep beep beep
b) OFF: Buzzer = beep beep beep beep
8.1.18.2. Ionizer Operation case study
Case 1
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CS-E24CKE CU-E24CKE
8.2. Protection Control Features
8.2.1. Protection Control For All Operations
8.2.1.1. Time Delay Safety Control
1. The compressor will not start for three minutes after stop of operation.
2. This control is not applicable if the power supply is cut off and on again or after 4-way valve deices condition.
8.2.1.2. 30 Seconds Forced Operation
1. Once the compressor starts operation, it will not stop its operation for 30 seconds.
2. However, it can be stopped using remote control or Auto Switch at indoor unit.
8.2.1.3. 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 2 minutes.
E24CK
Operation Mode
X (A)
Y (A)
Cooling/Soft Dry (A)
12.8
20.0
Cooling/Soft Dry (B)
10.3
20.0
Heating
13.0
20.0
4. The first 30 minutes of cooling operation, (A) will be applied.
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CS-E24CKE CU-E24CKE
8.2.1.4. IPM (Power transistor) Prevention Control
A. Overheating Prevention Control
1. When the IPM temperature rises to 110°C, compressor operation will stop immediately.
2. Compressor operation restarts after three minutes the temperature decreases to 95°C.
B. DC Peak Current Control
1. When electric current to IPM exceeds set value of 30.0 ± 5.0 A, the compressor will stop operate. Then, operation will restart
after three minutes.
2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after two
minute.
3. If the set value is exceeded again within 30 seconds after the compressor starts, the operation will restart after one minute.
If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.
8.2.1.5. Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated by compressor top temperature. The changes of frequency are as
below figure.
below figure.
8.2.1.6. Low Pressure Prevention Control (Gas Leakage Detection)
1. When the conditions listed in below table occur, the compressor stops and restarts after three minutes.
2. If this phenomenon is continuously occurring for twice within 20 minutes, all indoor and outdoor relays will be cut off.
3. This control is not applicable for deice operation.
Conditions
E24CK
Cooling/Soft Dry
Heating
1. Compressor frequency (Hz)
74
68
2. Outdoor total running current (A)
3.25
3.25
3. Indoor heat exchanger temperature (°C)
20
25
Note: Conditions 1 and 2 needed to be happened continuously for 5 minutes.
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CS-E24CKE CU-E24CKE
8.2.1.7. CT Disconnection Detection
1. Control Starting Condition
a. Total Current is below 0.74 ~ 0.94 Amp.
b. Operating Frequency is 20 Hz and above.
c.
Continuously for 20s.
2. Control Contents
a. Abnormal signal transmitted to indoor unit after 3 minutes outdoor power is supplied. (Indoor unit stop)
3. Control Cancellation Condition
Starting condition, (1) is not fulfilled.
8.2.1.8. Low Frequency Protection Control 1
When the compressor operate at frequency lower than 20 Hz for 240 minutes, the operation frequency will be increased to 20 Hz
for two minutes.
for two minutes.
8.2.1.9. Low Frequency Protection Control 2
When all the below conditions occur, minimum value (Freq. MIN) for the frequency instructed to compressor will change to 20 Hz.
Temperature, T, for:
Cooling/Soft Dry
Heating
Indoor intake air (°C)
T
15 or T
30
—
Outdoor air (°C)
T
16 or T
38
T
4 or T
24
Indoor heat exchanger (°C)
T
30
T
0
8.2.1.10. Low Frequency Protection Control 3
If Compressor operation frequency reduce from 20 Hz, the frequency will be fixed for 20 Hz for 3 min. before reduce to min.
frequency.
frequency.
8.2.1.11. Minimum Frequency Protection Control
• During cooling operation (except Anti Freezing control, soft dry) carry out the following operation.
Hi & above
20
Me- & above, Auto
20
Below Me-
20
However, when less than thermo OFF for 130 sec. continuously, the above control will be cancel.
• During heating operation, operate the followings control.
1. During Remote Control setting is 18°C & above
Indoor Fan Speed
Hi & above
20
Me- & above, Auto
20
Below Me-
20
However, when less than thermo OFF for 130 sec. continuously, the above control will be cancel.
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CS-E24CKE CU-E24CKE
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