Toshiba ESTIA R32 HWT-401HW-E Manual page 86

Error
Code
Technical cause
Casing thermostat operation
H04
If the casing thermostat reaches 125°C
Combined fault
L02
Model name of the outdoor unit is different
Duplicated main hydro unit during
L03 group control
There are several header units in the group.
Communication error
L07 Single Hydroboxes have a group
line
Hydro unit group / address not assigned
L08 Addressing has not been implemented for
Hydroboxes.
Communication error
L09 The capacity code has not been set for the
Hydrobox
Remove the maintenance PCB jumper
L10 Jumpers J800-J803 have not been
disconnected
Combined fault
L15
Model name of the Hydrobox is different
Setting error
L16 If ZONE 1 has not been set
while ZONE 2 has been set
0-10 V setting error
L22 DN680 settings in the group control are not
the same for all units.
Error in communication between the
outdoor unit PCB and MUCs
L29
No communication signal between IPDU and
CDB
Outlet temperature error
P03 If the hot gas temperature sensor (TD) reach-
es 111°C
High pressure switch fault
P04
Power supply voltage fault
P05 If the power supply voltage is extremely high
or low
Heat sink overheating fault
P07
If the heat sink reaches 105°C
46 I TOSHIBA 46 I
TOSHIBA
Diagnostics of functional operation
Backup
present
Automatic
reset
1. Check the cooling circuit (gas leakage)
2. Check the casing thermostat and connection
O X 3. Check whether the service valve is fully open
4. Pulse modulation valve defect
5. Check lines for kinks
1. Check the model name of the outdoor unit
X X
2. Check whether DP_SW13_4 is set to "OFF"
1. Check the addresses of the hydro units.
(DN_14)
X X 2. Check whether the remote control connection
(group/single person) has changed since the
hydro address was set
Replace the water-to-air heat exchanger control
X X
board
Check the Hydrobox addresses.
Note:
X X
This code is displayed the first time the system is
switched on following installation.
Check the setting of the FC01 capacity
specifications
X X 0012 = 805XWH**-E, P805XWH**-E
0015 = P1105XWH**-E
0017 = 1405XWH**-E
O X Disconnect J800-J803
1. Check the model name of the Hydrobox
X X
2. Check whether DP_SW13_4 is set to "ON"
X X Check DP-SW12_2.3
Check the 0-10 V setting for all units
X X
(DN_680)
O X Replace the control board of the outdoor unit
1. Check the cooling circuit (gas leakage)
2. Pulse modulation valve defect
O X
3. Check the resistance value of the hot gas
temperature sensor (TD)
O X
Check the power supply voltage
O X (AC220-230 V±10%: 1-phase unit)
(AC380-400 V±10%: 3-phase unit)
1. Check the threaded joint and heat sink grease
between the control board of the outdoor unit
and the heat sink
O X
2. Check the fan air duct of the heat sink
3. Check the resistance value of the heat sink
temperature sensor (TH)
Determination and measures