DOWNLOAD Panasonic CS-E18JKDW / CU-E18JKD / CS-E21JKDW / CU-E21JKD / CS-XE18JKDW / CU-XE18JKD Service Manual ↓ Size: 8.02 MB | Pages: 117 in PDF or view online for FREE

53

During multi split connection, indoor unit’s operation controls are same with single split connection unless specified in this chapter.

• Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature – Internal setting temperature <

-2.0°C.

• Capability resume supply to indoor unit after waiting for 3 minutes, if the Intake Air temperature – Internal setting temperature >

Capability supply OFF point.

• Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature – Internal setting temperature <

-3.0°C.

• Capability resume to indoor unit after waiting for 3 minutes, if the Intake Air temperature – Internal setting temperature > 

Capability supply OFF point.

• Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature – Internal setting temperature >

+1.0°C.

• During this condition, the indoor fan is stopped if compressor is ON.
• Capability resume supply to indoor unit after waiting for 3 minutes, if the Intake Air temperature – Internal setting temperature < 

Capability supply OFF point.

• Temperature sampling is controlled by outdoor unit where room temperature for all power supply ON indoor unit could be

obtained.

• When capability supply to the indoor unit is OFF and the compressor is ON, the indoor fan motor is stopped.

During this condition, 15 seconds after sampling signal from outdoor unit is received, the indoor fan start operation at low fan
speed.

• However, within first 4 minutes of capability stopped supply to the indoor unit, even sampling signal is received, the sampling

control is cancelled.

• This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control

operation mode, indoor intake and outdoor air temperature.

• During operation mode judgment, indoor fan motor (with speed of –Lo) and outdoor fan motor are running for 30 seconds to

detect the indoor intake and outdoor air temperature. The operation mode is decided based on below chart.

54

• Every 180 minutes, the indoor and outdoor temperature is judge. Based on remote control setting temperature, the value of T1

will increase up to 10°C, T2 will decrease by 3°C and T3 will decrease up to 8°C.

• To prevent high pressure at indoor unit, when heating mode thermostat-off condition or power supply OFF, indoor fan continue to

operate at controlled fan speed for maximum 30 seconds then stop.

• When the power mode is selected, the internal setting temperature will shift lower up to 4°C for Cooling/Soft Dry or higher up to

6°C for heating than remote control setting temperature, the powerful operation continue until user cancel the Powerful operation
by pressing powerful button again.

• When the power supply is cut off during the operation of air conditioner, the compressor will re-operate between three to four

minutes (10 patterns to be selected randomly) after power resume.

• During multi split connection, Indoor unit will resume previous mode, include unit standby mode.

Note:

• If POWER LED is blinking (0.5 seconds ON, 0.5 second OFF), the possible operation of the unit are during Indoor.

Residual Heat Removal, Hot Start, during Deice operation, operation mode judgment, or ON timer sampling.

• If POWER LED is blinking (2.5 seconds ON, 0.5 second OFF), the unit is in standby mode.
• If TIMER LED is blinking, there is an abnormality operation occurs.
• If e-ion LED is blinking, there is an abnormality of e-ion occurs.
• If PATROL LED is blinking, there is a gas sensor error detection.

• During multi split connection, Mild Dry Cooling Operation is disabled.

LED

POWER

TIMER

QUIET

POWERFUL

e-ion

MILD DRY Cooling

PATROL SENSOR

Color

Green

Orange

Orange

Orange

Blue

Not Applicable

Blue

Orange

Red

Light ON

Operation ON

Timer Setting ON

Quiet Mode ON

Powerful Mode ON

e-ion ON

Not Applicable

Air Clean Moderate Dirty

Light OFF Operation OFF Timer Setting OFF Quiet Mode OFF Powerful Mode OFF e-ion OFF

Not Applicable

Patrol OFF

55

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.

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.

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.

A. Overheating Prevention Control

1. When the IPM temperature rises to 110

qC, compressor operation will stop immediately.

2. Compressor operation restarts after three minutes the temperature decreases to 95

qC.

3. If this condition repeats continuously 4 times within 20 minutes, the LED will be blinking (“F96” is indicated).

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

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, timer LED will be blinking
(“F99” is indicated).

E18JK

E21JK

Operation Mode

 X (A)

Y (A)

 X (A)

Y (A)

Cooling/Soft Dry (A)

10.7

15.0

11.0

15.0

Cooling/Soft Dry (B)

7.7

15.0

9.6

15.0

Heating

10.7

15.0

11.5

15.0

56

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

qC, compressor will be stop, occurs 4 times per 20 minutes, timer LED will be

blinking (“F97” is to be confirmed).

a. Control start conditions

• For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A.
• During Cooling and Soft Dry operations:

Indoor suction temperature - indoor piping temperature is below 4

qC.

• During Heating operations :

Indoor piping temperature - indoor suction is under 5

qC.

b. Control contents

• Compressor stops (and restart after 3 minutes).
• If the conditions above happen 2 times within 20 minutes, the unit will:

- Stop operation
- Timer LED blinks and “F91” indicated.

• When the compressor operate at frequency lower than 24 Hz continued for 20 minutes, the operation frequency will be changed

to 23 Hz for 2 minutes.