Toshiba HWS-455XWHM3-E Manuel D'installation page 61

Hydro Unit
Diagnostic functional operation
Check
code
Operational cause
Compressor lock
H02
Defect in the current detection
H03
circuit
Operation of case thermostat
H04
Unset service PC board jumper
L10
Jumpers have not been cut.
Combination error
L15 Model name of the hydro unit is
different.
The communication between the
L29
outdoor PC board MUCs error
The outlet temperature error
P03
The high pressure switch error
P04
P05 The power supply voltage error
Overheating of heat-sink error
P07
Detection of gas leak
P15
Backup Automatic
operation reset
1. Defect of compressor (lock)
×
– Replace the compressor.
O
2. Defect of compressor wiring (open phase).
×
O 1. Replace the outdoor inverter control board.
1. Check the refrigeration cycle (gas leak).
2. Check the case thermostat and connector.
×
O 3. Check that the service valve is fully open.
4. Defect of the pulse motor valve.
5. Check for kinked piping.
×
O 1. Cut outdoor PC board jumper wire (for service).
1. Check the model name of the hydro unit.
× ×
2. Check DP_SW13_4 is set to "ON".
×
O 1. Replace the outdoor control board.
1. Check the refrigeration cycle (gas leak).
2. Defect of the pulse motor valve.
×
O
3. Check the resistance value of the discharge
temperature sensor (TD).
1. Almost no or little water flow.
2. Defect of the flow switch.
×
O 3. On-load operation under the above conditions.
4. Defect in the high pressure switch.
5. Failure of a refrigerant value to open.
×
O 1. Check the power supply voltage.
1. Check the thread fastening and heat-sink grease
between the outdoor control board and the heat-sink.
×
O 2. Check the heat-sink fan duct.
3. Check the resistance value of the heat-sink
temperature sensor (TH).
1. Check the refrigeration cycle (gas leak).
2. Check that the service valve is fully open.
3. Defect of the pulse motor valve.
4. Check for kinked piping.
×
O
5. Check the resistance value of the discharge
temperature sensor (TD), the suction temperature
sensor (TS).
6. Check the value of PD sensor by the remote
controller.
– 60 –
Installation Manual
Determination and action
EN
60-EN