Toshiba RAV-SM304SDT-TR Service Manual page 86

Error mode detected by outdoor unit
The check code has been ramified from "4 series" and after.
The ramified check code is displayed only when both the indoor unit and the outdoor unit are "4 series" and after.
(Ex. Combination of RAV-SM804UT-E with RAV-SP804AT-E)
When the indoor unit is 3 series and before, the conventional check code is displayed.
(Ex. Combination of RAV-SM802BT-E and RAV-SP804AT-E: Outdoor unit only is "4 series".)
Operation of diagnostic function
Check code
Indoor unit
Cause of operation
before after
3 series 4 series
Disconnection, short-circuit of
F04 F04
discharge temp. sensor (TD)
Disconnection, or short-circuit of
F06 F06
outdoor temp. sensor (TE)
Disconnection, or short-circuit of
F07
outdoor temp. sensor (TL)
Disconnection, or short-circuit of
F12
suction temp. sensor (TS)
Miss-mounting of outdoor temp.
F15
sensor (TE, TS)
Disconnection, or short-circuit of
F08 F08
outside temp. sensor (TO)
Disconnection, or short-circuit of heat
L29 F13
sink temp. sensor (TH)
F31 Outdoor P.C. EEPROM error
L10 Incorrect setting of service P.C. board
Communication error between MCUs
L29
on outdoor P.C. board
Heat sink overheat error
P07
∗ Heat sink temp. sensor detected
over the specified temperature.
Detection of gas leak
∗ Discharge temp. sensor (TD),
P15
Suction temp. sensor (TS) detected
temperature over the specified temp.
4-way valve inverse error
∗ After heating operation has started,
indoor heat exchanger temp. lowers
P19 under the specified temp.
∗ After heating operation has started,
outdoor heat exchanger / suction
temp. rises over the specified temp.
Compressor break down
∗ Although operation has started,
H01 H01
operation frequency decreases and
operation stops.
Compressor lock
H02 H02
* Over-current detection after
compressor start-up
H03 H03 Current detection circuit error
Status of
Condition
air conditioner
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Continue
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
– 86 –
Judgment and measures
1. Check discharge temp. sensor (TD).
2. Check outdoor P.C. board.
1. Check temp. sensor (TE).
2. Check outdoor P.C. board.
1. Check temp. sensor (TL).
2. Check outdoor P.C. board.
1. Check suction temp. sensor (TS).
2. Check outdoor P.C. board.
1. Check temp. sensor (TE, TS).
2. Check outdoor P.C. board.
1. Check outside temp. sensor (TO).
2. Check outdoor P.C. board.
1. Check outdoor P.C. board.
1. Check outdoor P.C. board.
1. Outdoor service P.C. board
Check model type setting jumper wire.
1. Check outdoor P.C. board.
1. Check screw tightening between PC. Board and heat
sink and check radiator grease.
2. Check heat sink cooling.
1. Check gas leak.
2. Check whether the service valve is fully opened.
3. Check PMV (Pulse Motor Valve).
4. Check broken pipe.
5. Check discharge temp. sensor (TD), suction temp.
sensor (TS).
1. Check operation of 4-way valve.
2. Check outdoor heat exchanger (TE), suction temp.
sensor (TS).
3. Check indoor heat exchanger sensor (TC).
4. Check 4-way valve coil.
5. Check PMV (Pulse Motor Valve).
1. Check power supply voltage. (AC198 to 264V)
2. Overload operation of refrigerating cycle
1. Trouble of compressor (Lock, etc.): Replace compressor.
2. Wiring error of compressor (Open circuit)
1. Check outdoor P.C. board. (AC current detection circuit)