Toshiba HWT-601XWHT6W-E - Page 104

103
H04
Operation of case thermostat
When the case thermostat exceeds
125°C.
O
×
1. Check the refrigeration cycle (gas
leak).
2. Check the case thermostat and
connector.
3. Check that the service valve is fully
open.
4. Defect of the pulse motor valve.
5. Check for kinked piping.
10 128
L10
Unset service PC board jumper
Jumpers J800-J803 have not been cut.
O
×
1. Cut J800-J803. 1 128
L15
Combination error
Model name of the Hydro unit is
different.
××
1. Check the model name of the Hydro
unit.
2. Check the DN_6BD.
1128
L29
The communication between the
outdoor PC board MCUs error
No communication signal between
Interface CDB and Compressor, fan
IPDU.
O
×
1. Check the connection of connector
and wiring.
2. Check the outdoor control board.
1128
P03
Discharge temperature error
1)High temperature
When the discharge temperature sensor
(TD) exceeds 111°C.
O
×
1. Check the refrigeration cycle (gas
leak).
2. Defect of the pulse motor valve.
3. Check the resistance value of the
discharge temperature sensor (TD).
4
129
2)INJ_2-way valve error (801, 1101)
When the INJ_2-way valve opening is
detected in heating or hot water supply
mode even in situation INJ_2-way valve
not working.
1. Defect of the INJ_2-way valve.
2. Dirt clogging in the refrigeration
cycle.
8
3)INJ_PMV error (801, 1101)
When too big INJ_PMV opening value is
detected in heating or hot water supply
mode.
1. Defect of the INJ_PMV.
2. Dirt clogging in the refrigeration
cycle.
8
P04
The high pressure switch error
O
×
1. Almost no or little water flow.
2. Defect of the flow sensor.
3. Defect in the high pressure switch.
4. Failure of a refrigerant valve to open.
10 130
P05
The power supply voltage error
When the power supply voltage is
extremely high or low.
O
×
1. Check the power supply voltage.
(AC220-240 V±10%).
8131
P07
Overheating of heat-sink error
When the heat-sink exceeds 105°C.
O
×
1. Check the thread fastening and
heat-sink grease between the
outdoor control board and the heat-
sink.
2. Check the heat-sink fan duct.
4131
Check
code
Diagnostic functional operation
Determination and action
Number of
abnormalities
for
confirmation
Detailed
item
Operational cause
Backup
operation
Automatic
reset