Carrier 42TGV0131CP Service Manual

[E03 error] (Header indoor unit)[E03 error] is detected when the indoor unit cannot receive a signal from the remote controller(also central controller).Check A and B remote controllers and communication lines of the central control system U3 and U4.As communication is impossible, this check code [E03] is not displayed on the remote controller and the centralcontroller. [E01] is displayed on the remote controller and [C06 error] is displayed on the central controller.If these check codes generate during operation, the air conditioner stops.[F29 error]This check code indicates a detection error of IC503 non-volatile memory (EEPROM) on the indoor unit P.C.board, which generated during operation of the air conditioner. Replace the service P.C. board.∗ When EEPROM was not inserted when power supply turned on or when the EEPROM data read/writeoperation is impossible at all, the automatic address mode is repeated. In this time, [C06 error] is displayedon the central controller.[P31 error] (Follower indoor unit)When the header unit of a group operation detected [E03], [L03], [L07] or [L08] error, the follower unit of thegroup operation detects [P31 error] and then the unit stops.There is no display of the check code or alarm history of the wired remote controller. (In this model, the modeenters in automatic address set mode when the header unit detected [L03], [L07] or [L08] error.)(Power ON) [SET] is displayedon remote controller.[SET]goes off.LED (D501) on indoor unitP.C. board flashes with1Hz for approx. 10 seconds.Reboot(Reset)(Repetition)(Approx.3 minutes)(Approx.1 minute)FILE NO. SVM-19024- 65 -