Mini VRF SYSTEM
Test Run
7 - 23
7
7. Self-Diagnosis Function Table and Contents of Alarm Display
•• Auto address setting begins but finishes improperly.
Symptom Cause and countermeasure
•• Soon after a few seconds or after a few minutes, the alarm
content is displayed on the remote controller.
See “Contents of Alarm Display” and make a correction.
•• After a few minutes when auto address setting begins, the
compressor may occasionally start and stop several times. LEDs
1 and 2 on outdoor unit control PCB show the display of auto
address setting with blinking alternately but LEDs 1 and 2 do not
indicate the completion of auto address setting (go out).
Are remote control wiring and inter-unit control wiring
connected properly?
Is indoor unit turned on power?
•• If the alarm display “E15”, “E16” and “E20” appear after auto address setting began, check the following items.
Alarm display Alarm contents
E15
Recognized number of indoor units at the time of auto address setting are fewer than that of indoor
units set by SW3 and SW4 on outdoor unit control PCB (Main).
E16
Recognized number of indoor units at the time of auto address setting are more than that of indoor units
set by SW3 and SW4 on outdoor unit control PCB (Main).
E20
Outdoor unit could not entirely receive serial communication signal from the indoor unit within 90
seconds after auto address setting began.
Check E15 E16 E20
Have you forgotten to turn on power to indoor unit?
Are indoor and outdoor control wiring connected properly?
(Check for incorrect wiring to open & short-circuit, terminal pin and remote control terminal.)
Are the number of the connecting indoor units set by SW3 and SW4 of outdoor unit control PCB
(Main) connected properly?
Is additional appropriate amount of refrigerant charge?
(Compressor ON at the time of auto address setting)
Is the refrigerant tubing connected properly?
(Compressor ON at the time of auto address setting)
Are E1 and E3 sensors of indoor unit normal?
(Compressor ON at the time of auto address setting)
Are there any wrong system address installed in indoor units caused by manual or incorrect auto
address control?
1) When auto address setting from outdoor unit control PCB (Main) or remote controller begins, “Under Setting”
appears on the remote controller as for normal indoor units under the inter-unit control wirings and remote
control wirings.
LEDs 1 and 2 indicators on outdoor unit control PCB (Main) blink alternately.
2) If there is an error at the inter-unit control wiring of the remote controller when in the indoor unit group control,
address setting may not occasionally be made although “under setting” is displayed.
3) Although the alarm “E15” and “E16” are displayed, addresses will be installed in the recognized indoor units.
The installed addresses can be checked by the remote controller. See “Checking the indoor unit addresses”.
•• When operating the remote controller after auto address setting completed (LEDs 1 and 2 indicators on outdoor
unit control PCB (Main) go out), correct the symptom if the following alarms appear on the remote controller.
Remote control display
Cause
No display
Remote controller is not connected properly. (Power failure)
When auto address setting was completed, the power of indoor unit was turned o.
E01
Remote controller is not connected properly. (Receiving failure from remote control)
Indoor unit address was mistakenly controlled by undesired indoor unit remote controller.
(Impossible to communicate with outdoor unit)
E02
Remote controller is not connected properly.
(Impossible to communicate with indoor unit by remote controller)
P09 Connector of indoor unit ceiling panel is not connected properly.
If any other alarm appears on the display, see Section 6.
• Alarm display can be checked by the outdoor maintenance remote controller. When operating, see Section 6.
Alarm display can also be checked by number of blinking of LEDs 1 and 2 on outdoor unit control PCB.
(See “How to know LEDs 1 and 2 alarm display on outdoor unit control PCB” under “7. Self-Diagnosis Function
Table and Contents of Alarm Display”.)
Remote control display Alarm contents
C17 Indoor unit does not respond to central control equipment.
E01 Indoor unit does not respond to remote controller.
E02 Remote controller is having error in sending serial communication signal.
E03 Remote controller does not respond to indoor unit.
E04 Outdoor unit does not respond to indoor unit.
E06 Some indoor units do not respond to outdoor unit.
E08 Indoor unit address is duplicating.
E09 Two or more remote controllers are set as main on R1-R2 link.
E12 Auto Address failed to start.
E14 Two or more indoor units are set as main, in the group controlled indoor units.
E15 Fewer indoor units are found in Auto Addressing than the setting on outdoor unit control PCB.
E16 More indoor units are found in Auto Addressing than the setting on outdoor unit control PCB.
E18 No response from sub indoor to the main indoor unit in group control wiring.
E20 No indoor unit responded in Auto Addressing.
E31 Error in communication inside outdoor unit control box.
F01 Indoor unit heat exchanger liquid temperature sensor has failure. (E1)
F02 Indoor unit heat exchanger temperature sensor has failure. (E2)
F03 Indoor unit heat exchanger gas temperature sensor has failure. (E3)
F04 Compressor discharge temperature sensor has failure. (DISCH)
F06 Outdoor unit heat exchanger gas temperature sensor has failure. (EXG)
F07 Outdoor unit heat exchanger liquid temperature sensor has failure. (EXL)
F08 Outdoor temperature sensor has failure. (TO)
F10 Indoor suction air (room) temperature sensor has failure. (TA)
F11 Indoor discharge air temperature sensor has failure. (BL)
F12 Compressor inlet temperature sensor has failure. (SCT)
F14 Subcooling heat exchanger temperature sensor has failure. (SCG)
F16 High pressure sensor has failure. (HPS)
F17 Low pressure sensor has failure. (LPS)
F29 EEPROM on indoor unit control PCB has failure.
F31 EEPROM on outdoor unit control PCB has failure.
H01 Compressor primary current is overcurrent.
H02 PFC is overcurrent or VDC is overvoltage. (Single phase only)
H03 Compressor current sensor is disconnected or shorted.
H05 Compressor discharge temperature sensor is disconnected, shorted or misplaced. (DISCH)
H06 Low pressure sensor value is too low.
H31 Compressor HIC has failure. HIC is overcurrent or overheat. VDC is undervoltage or overvoltage.
J01 R32 refrigerant leakage detection sensor has failure.
J02 Life of refrigerant leak sensor in R32 refrigerant leakage detection sensor has expired.
J03 Indoor unit refrigerant leak sensor 1 has failure. (GAS1)
J04 Life of Indoor unit refrigerant leak sensor 1 has expired. (GAS1)
J05 Indoor unit refrigerant leak sensor 2 has failure. (GAS2)
J06 Life of indoor unit refrigerant leak sensors 1 and 2 has expired. (GAS1 and GAS2)
L01 Indoor unit address setting has error. (No main indoor unit in group control.)
L02 Indoor unit model does not match with the outdoor unit model. (Multi-split/mini-split)
L03 Two or more indoor units are set as main in group control.
L04 Duplicate system address setting on outdoor units.
L05 Two or more indoor units are set as priority indoor unit (priority indoor unit).
L06 Two or more indoor units are set as priority indoor unit (non-priority indoor unit).
L07 Group control wiring is detected for indoor unit set as individual control.
SM830289-01_欧州向け R32 mini VRF 8,10HP SM&TRSM.indb 23SM830289-01_欧州向け R32 mini VRF 8,10HP SM&TRSM.indb 23 2021/05/07 10:16:522021/05/07 10:16:52
To Next Page