Panasonic CS-E10JD3EA / U-E10HBEA / CS-E15JD3EA / CU-E15HBEA / CS-E18JD3EA / CU-E18HBEA Service Manual ▷ View online
49
12.4. Timer Control
12.4.1.
ON Timer Control
ON timer can be set using remote control, the unit with timer set will start operate earlier than the setting time. This is to provide a
comfortable environment when reaching the set ON time.
comfortable environment when reaching the set ON time.
60 minutes before the set time, indoor (at fan speed of Lo-) and outdoor fan motor start operate for 30 seconds to determine the
indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.
indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.
From the above judgment, the decided operation will start operate earlier than the set time as shown below.
12.4.2.
OFF Timer Control
OFF timer can be set using remote control, the unit with timer set will stop operate at set time.
12.5. Auto Restart Control
1. When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four
minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after
power supply resumes.
power supply resumes.
2. This type of control is not applicable during ON/OFF Timer setting.
12.6. Indication Panel
Note:
• If OFF/ON operation LED is OFF and OFF indicator does not shown on remote control display, there is an abnormality operation
occurs.
LED
OFF/ON Operation
Color
Green
Light ON
Operation ON
Light OFF
Operation OFF
50
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.
• 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.
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.
4. The first 30 minutes of cooling operation, (A) will be applied.
E10HB
E15HB
E18HB
Operation Mode
X (A)
Y (A)
X (A)
Y (A)
X (A)
Y (A)
Cooling/Soft Dry (A) & (C)
4.95
15.06
7.79
15.06
8.83
15.06
Cooling/Soft Dry (B)
4.43
15.06
6.06
15.06
7.79
15.06
Heating
6.21
15.06
9.00
15.06
10.08
15.06
51
13.1.4.
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 22.33 ± 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
minutes.
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.
13.1.5.
Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency
are as below figure.
If compressor discharge temperature exceeds 112
are as below figure.
If compressor discharge temperature exceeds 112
°C, compressor will be stop, occurs 4 times per 20 minutes, timer LED will be
blinking (“F97” is to be confirmed).
13.2. Protection Control For Cooling & Soft Dry Operation
13.2.1.
Outdoor Air Temperature Control
The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.
This control will begin 1 minute after the compressor starts.
Compressor frequency will adjust base on Outdoor Air Temperature.
This control will begin 1 minute after the compressor starts.
Compressor frequency will adjust base on Outdoor Air Temperature.
52
13.2.2.
Cooling Overload Control
i. Pipe temperature limitation/restriction
• Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operation frequency)
• The compressor stop if outdoor pipe temperature exceeds 63
• The compressor stop if outdoor pipe temperature exceeds 63
°C.
• If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95: outdoor high pressure rise protection)
13.2.3.
Dew Prevention Control 1
1. To prevent dew formation at indoor unit discharge area.
2. This control activated if:
2. This control activated if:
• Outdoor air temperature and Indoor pipe temperature judgment by microcontroller if fulfilled.
• When Cooling or Dry mode is operated more than 20 minutes or more.
• When Cooling or Dry mode is operated more than 20 minutes or more.
3. This control stopped if:
• Compressor stopped.
• Remote control setting changed. (fan speed / temperature)
• Outdoor air temperature and indoor intake temperature changed.
• Remote control setting changed. (fan speed / temperature)
• Outdoor air temperature and indoor intake temperature changed.
13.2.4.
Dew Prevention Control 2
1. To prevent dew formation at indoor unit discharge area.
2. This control starts if all conditions continue for 20 minutes:
2. This control starts if all conditions continue for 20 minutes:
• Operated with Cooling or Soft Dry Mode.
• Indoor intake temperature is between 25
• Indoor intake temperature is between 25
°C and 29°C.
• Outdoor air temperature is less than 30
°C.
• Quiet Lo fan speed.
3. This control stopped if:
• When receive air swing change signal from Remote Control.
13.2.5.
Freeze Prevention Control
1. When indoor heat exchanger temperature is lower than 7
°C continuously for six minutes, compressor will stop operating.
2. Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 13
°C.
3. At the same time, indoor fan speed will be higher than during its normal operation.
4. If indoor heat exchanger temperature is higher than 13
4. If indoor heat exchanger temperature is higher than 13
°C for 5 minutes, the fan speed will return to its normal operation.
Click on the first or last page to see other CS-E10JD3EA / U-E10HBEA / CS-E15JD3EA / CU-E15HBEA / CS-E18JD3EA / CU-E18HBEA service manuals if exist.