Troubleshooting; Outline Of Judgment - Toshiba RAV-HM301MUT-E Service Manual

6-2. Troubleshooting

6-2-1. Outline of judgment

The primary judgment to check whether a trouble occurred in the indoor unit or outdoor unit is carried out with
the following method.
Method to judge the troubled position by flashing indication on the display part of the indoor unit
(sensors of the receiving part)
The indoor unit monitors the operating status of the air conditioner, and the blocked contents of self-diagnosis
are displayed restricted to the following cases if a protective circuit works.
Lamp indication
Operation Timer Ready
No indication at all
Operation Timer Ready
Flash
Operation Timer Ready
Flash
Operation Timer Ready
Alternate flash
Operation Timer Ready
Alternate flash
∗1: These are representative examples and the check code differs according to the outdoor unit to be combined.
Check code
— Power supply OFF or miswiring between receiving unit and indoor unit
E01
Receiving trouble
Sending trouble
E02
Communication stop
E03
E08
Duplicated indoor unit No.
Duplicated header units of remote controller
E09
E11 Communication trouble between Application control kit and indoor unit P.C. board
Wire connection trouble between indoor units, Indoor power OFF
E18 (Communication stop between indoor header and follower or between master
and sub indoor twin)
Miswiring between indoor unit and outdoor unit or connection trouble
E04
(Communication stop between indoor and outdoor units)
P10 Overflow was detected.
P12 Indoor DC fan trouble
P03 Outdoor unit discharge temp. trouble
P04 Outdoor high pressure system trouble
P05 Negative phase detection trouble
P07 Heat sink overheat trouble
P15 Gas leak detection trouble
P19 4-way valve system trouble (Indoor or outdoor unit judged.)
P20 Outdoor unit high pressure protection
P22 Outdoor unit: Outdoor unit trouble
P26 Outdoor unit: Inverter Idc operation
P29 Outdoor unit: Position detection trouble
Stopped because of trouble of other indoor unit in a group
P31
(Check codes of E03/L03/L07/L08)
: Go off,
Cause of trouble occurrence
Receiving unit
Protective device of indoor unit worked.
– 50 –
: Go on, : Flash (0.5 sec.)
Miswiring or wire connection trouble
between receiving unit and indoor unit
Setup trouble
Protective device of
outdoor unit worked.
Outdoor unit trouble
Protective device of
outdoor unit worked.
∗1
∗1