Toshiba RAV-SM1603AT-E Service Manual page 96

[E04 error]
Does outdoor unit operate?
YES
NO
Is setup of group address correct?
YES
Are 1, 2, 3 inter-unit cables normal?
YES
Are connections from connectors
of inter-terminal blocks (1, 2, 3)
of indoor/outdoor units normal?
YES
Does voltage between
2 and 3 of inter-terminal blocks (1, 2, 3)
of indoor unit vary?∗
YES
Is DC280V applied between
terminals of the electrolytic condenser
of IPDU main circuit?
YES
Is power DC280V supplied to CDB? (CN03)
YES
Is power DC7V supplied to CDB?
Are wiring between (CN800)
and pin, and wiring between
5
IPDU and CDB correct?
CN06 ↔ CN800
YES
Is case thermo (CN500) connected?
YES
Does case thermo. operate?
NO
Check indoor P .C. board.
Defect → Replace
NO
NO
NO
NO
∗ As shown in the following figure, perform measurement
within 20 seconds after power ON.
Inter-terminal block
NO
NO
pin
2 NO
NO
YES
– 96 –
Check item code [14].
Correct inter-unit cable.
Correct connection of connector.
Check indoor P .C. board.
Defect → Replace
S5277G
Black 3
White
2
1
Replace IPDU.
Replace IPDU.
Correct connection of connector.
Correct connection of connector.
Check/Correct charged
refrigerant amount.