Toshiba Carrier RAV-SP180AT2-UL Service Manual page 64

CODE Outdoor
No. LED display
[H04] <Display 1> <Display 2>
[L10] <Display 1> <Display 2>
[L29] ∗ There is a possibility that it is one of the following errors.
Confirm LED on outdoor P.C. board to judge which error it is.
Communication error between MCU, Heat sing temp. sensor (TH) error, EEPROM error,
Unset model type, Heat sink overheat error, Gas leak detection, 4-way valve inverse error
<Display 1> <Display 2>
<Display 1> <Display 2>
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[Case thermostat operation]
Are CN609 connection
and case thermostat normal?
YES
Is cooling/heating operation
available when short-circuiting
case thermostat?
YES
Is there no gas leak?
Is it not refrigerant shortage?
YES
Is valve fully opened?
YES
Is PMV normal?
YES
[Unset model type]: Only when service P.C. board is used
Cut jumper line according
to the explanation sheet packaged
with the service P.C. board.
[Communication error between MCU]
Check outdoor P.C. board.
Defect → Replace
[Heat sink temp. sensor (TH) error] → Refer to [F13] column.
– 64 –
NO
Correct connector.
Case thermostat error → Replace
NO
Check outdoor P.C. board.
Defect → Replace
NO
Repair defectives position.
Recharge refrigerant.
NO
Open valve fully.
NO
Correct defective position.
Replace defective part.
Check crushed or broken pipe.
Defect → Correct and Replace