Air-Conditioner Split Type Service Manual

49
Error mode detected by outdoor unit
◎ : Flash, 〇 : Go on, ● : Go off
Wireless sensor
lamp display
Operation Timer Ready
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◎○◎
◎○◎
◎●◎
◎●◎
◎●◎
◎●◎
◎●◎
◎◎○
◎◎○
◎◎○
Wired remote
controller
Check code
H01
H02
H03
L29
L31
P03
P04
P22
P26
P29
F04
F06
F08
Diagnostic function
Cause of operation
Breakdown of compressor
• Displayed when error is detected
Compressor does not rotate.
• Over-current protective circuit operates after specified time
passed when compressor had been activated.
Current detection circuit error
• Current value at AC side is high even during compressor-OFF.
• Phase of power supply is missed.
Outdoor unit and other errors
• Communication error between CDB and IPDU
(Coming-off of connector)
• Heat sink temperature error
(Detection of temperature over specified value)
Phase detection protective circuit operates.
(Normal models)
Discharge temperature error
• Discharge temperature over specified value was detected.
High-pressure protection error by TE sensor
(Temperature over specified value was detected.)
Outdoor DC fan error
Inverter over-current protective circuit operates. (For a short time)
Short voltage of main circuit operates.
IPDU position detection circuit error
Coming-off, disconnection or short of outdoor temperature
sensor (TD)
Coming-off, disconnection or short of outdoor temperature
sensor (TE/TS)
Coming-off, disconnection or short of outdoor temperature
sensor (TO)
Status of air
conditioner
Stop
Stop
Stop
Stop
Operation continues.
(Compressor stops.)
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Operation continues.
Condition
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Judgment and measures
1. Check power voltage. AC200V±20V
2. Overload operation of refrigerating cycle
3. Check current detection circuit at AC side.
1. Trouble of compressor (Compressor lock, etc.) : Replace compressor.
2. Defective cabling of compressor (Phase missing)
3. Phase-missing operation of power supply (3-phase model)
1. Compressor immediately stops even if restarted. : Check IPDU.
2. Phase-missing operation of power supply
Check 3-phase power voltage and cables.
1. Check cables of CDB and IPDU.
2. Abnormal overload operation of refrigerating cycle
1. Check power phase order (Reversed phase)/phase missing.
2. Check outdoor P.C. board.
1. Check refrigerating cycle. (Gas leak)
2. Trouble of PMV
3. Check Td sensor.
1. Overload operation of refrigerating cycle
2. Check outdoor temperature sensor (TE).
3. Check outdoor CDB P.C. board.
1. Defective detection of position
2. Over-current protective circuit of outdoor fan driving unit operates.
3. Lock of outdoor fan
4. Check outdoor CDB P.C. board.
1. Inverter immediately stops even if restarted. : Compressor motor rare short
2. Check IPDU. : Cabling error
1. Position detection circuit operates even if operating compressor by removing
3P connector. : Replace IPDU.
1. Check outdoor temperature sensor (TD).
2. Check outdoor CDB P.C. board.
1. Check outdoor temperature sensor (TE/TS).
2. Check outdoor CDB P.C. board.
1. Check outdoor temperature sensor (TO).
2. Check outdoor CDB P.C. board.
For an error mode detected in outdoor unit, the fan operates because sub unit of a group operation does not communicate with the outdoor unit.