Toshiba HWS-1405XWHM3-E, Installation Manual

Page: 61 / 250

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