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–31–
Under Ceiling Type
Installation Manual
Toshiba
F31
(L29)
SIM
Outdoor unit P.C.
board
Outdoor Outdoor P.C. board ---- In the case of EEPROM error. Entire stop
H01
Outdoor unit
compressor
breakdown
Outdoor
Current detect circuit, power voltage --- Minimum
frequency was reached in the current releasing control or
short-circuit current (Idc) after direct excitation was
detected
Wiring error of compressor (open phase)
Entire stop
H02
Outdoor unit
compressor lock
Outdoor
Compressor circuit --- Compressor lock was detected.
Wiring error of compressor (open phase)
Entire stop
H03
Outdoor unit current
detect circuit error
Outdoor
Current detect circuit, outdoor unit P.C. board ---
Abnormal current was detected in AC-CT or a phase loss
was detected.
Entire stop
H04
(P04)
Case thermostat
operation
Outdoor Malfunction of the case thermostat Entire stop
H06
Outdoor unit low-
pressure system error
Outdoor
Current, high-pressure switch circuit, outdoor P.C. board
--- Ps pressure sensor error was detected or low-pressure
protective operation was activated.
Entire stop
L03 SIM
Duplicated header
indoor units
Indoor
Indoor address setting error --- There are two or more
header units in the group.
Entire stop
L07 SIM
Group line in individual
indoor unit
Indoor
Indoor address setting error --- There is at least one
group-connected indoor unit among individual indoor
units.
Entire stop
L08 SIM
Indoor group address
not set
Indoor
Indoor address setting error --- Indoor address group has
not been set.
Entire stop
L09 SIM
Indoor power level not
set
Indoor Indoor power level has not been set. Entire stop
L10
(L29)
SIM
Outdoor unit P.C.
board
Outdoor
In the case of outdoor P.C. board jumper wire (for service)
setting error
Entire stop
L20 SIM
LAN communication
error
Network
adapter
central
control
Address setting, central control remote control, network
adapter --- Duplication of address in central control
communication
Auto-reset
L29 SIM
Other outdoor unit
error
Outdoor
Other outdoor unit error Entire stop
1) Communication error between IPDU MCU and CDB
MCU
Entire stop
2) Abnormal temperature was detected by the heat sink
temp. sensor in IGBT.
L30 SIM
Abnormal external
input into indoor unit
(interlock)
Indoor
External devices, outdoor unit P.C. board --- Abnormal
stop due to incorrect external input into CN80
Entire stop
L31 SIM
Phase sequence error,
etc.
Outdoor
Power supply phase sequence, outdoor unit P.C. board -
-- Abnormal phase sequence of the 3-phase power
supply
Operation
continued
(thermostat
OFF)
P01 ALT Indoor unit fan error Indoor
Indoor fan motor, indoor P.C. board --- Indoor AC fan
error (fan motor thermal relay activated) was detected.
Entire stop
P03 ALT
Outdoor unit discharge
temp. error
Outdoor
An error was detected in the discharge temp. releasing
control.
Entire stop
P04 ALT
Outdoor unit high-
pressure system error
Outdoor
High-pressure switch --- The IOL was activated or an
error was detected in the high-pressure releasing control
using the TE.
Entire stop
P05
(P04)
ALT Open phase detected Outdoor
The power cable may be connected incorrectly. Check
open phase and voltages of the power supply.
Entire stop
P07 ALT Heat sink overheat Outdoor
Abnormal temperature was detected by the temp. sensor
of the IGBT heat sink.
Entire stop
P10 ALT
Indoor unit water
overflow detected
Indoor
Drain pipe, clogging of drainage, float switch circuit,
indoor P.C. board --- Drainage is out of order or the float
switch was activated.
Entire stop
P15
(L29)
ALT Gas leakage detected Outdoor
There may be gas leakage from the pipe or connecting
part. Check for gas leakage.
Entire stop
P19
(L29)
ALT 4-way valve error
Outdoor
(Indoor)
4-way valve, indoor temp. sensors (TC/TCJ) --- An error
was detected due to temperature drop of the indoor unit
heat exchanger sensor when heating.
Auto-reset
(Auto-reset)
P20
(P04)
ALT
High-pressure
protective operation
Outdoor High-pressure protection Entire stop
31-EN
+00EH99864801_00Ta.book Page 31 Tuesday, November 24, 2009 5:40 PM