Toshiba ESTIA R32 HWT-401HW-E Manual page 87

Diagnostics of functional operation
Error
Code
Technical cause
Detection of a gas leakage
- If the hot gas temperature sensor (TD)
exceeds 106°C for more than 10 minutes
- If the suction gas temperature sensor (TS)
reaches 60°C during cooling or 40°C during
P15 heating for 10 consecutive minutes
If TG≤TC -10K and TG≤TWI -15K
was detected for 10 minutes (hot water
supply, heating)
- If TG≤TE -12K was detected for 10 minutes
(cooling)
4-way check valve fault
If the coil temperature sensor (TE) reaches
P19 30°C or the suction gas temperature sensor
(TS) reaches 50°C during operation of the
heat pump
High-pressure protection mode
- If an abnormal stop occurs because of the
high-pressure relief control
- If the high pressure sensor (PD) detects
4.05 MPa
P20
- If the heat exchange temperature sensor
(TL) detects 63ºC during cooling mode
- If the water outlet sensor (TWO) detects
60°C during heating or hot water supply
mode
Outdoor unit fan system fault
If the DC fan reference point measurement
fails, motor winding short circuit, loss of rotor
P22
synchronization due to motor operation fault
or abnormal motor current (e.g., blocked
rotor)
Short circuit error in the compressor
drive element
P26
If an abnormal short circuit of the IGBT
occurs
Compressor rotor position error
P29 The rotor position in the compressor cannot
be determined
Fault occurs in the slave Hydrobox
when a fault occurs in the master
P31
Hydrobox
Backup
Automatic
present
reset
1. Check the cooling circuit (gas leakage)
2. Check whether the service valve is fully open
3. Pulse modulation valve defect
4. Check lines for kinks
O X
5. Check the resistance value of the drain
6. Check the PD sensor with the remote control
1. Check the operation of the 4-way valve and the
2. Pulse modulation valve defect
O X
3. Check the resistance value of the heat
1. Check whether the service valve is fully open
2. Pulse modulation valve defect
3. Check the outdoor unit fan system
4. Overfilling with refrigerant
O X 5. Check the resistance value of the heat exchange
6. Check the value of the high pressure sensor (PD)
7. Water pipe is too short. Install a buffer tank
1. Check the blocked state of the motor fan
2. Check the cable connection of the fan motor
O X 3. Check the power supply voltage
1. P26 anomaly during operation with disconnected
O X
2. No anomaly during operation with disconnected
1. Despite the fact that the connection lead wire
O X
2. Check the winding resistance of the compressor
1. Check the remote control connection
2. Remote control defect
X O
3. Set the address number from DN_12 to 14
Determination and measures
temperature sensor (TD) and the air intake
temperature sensor (TS)
coil properties
exchanger (TE) temperature sensor and air
intake temperature sensor (TS)
(including for blockages)
temperature sensor (TL) and the water outlet
temperature sensor (TWO)
or set the temperature lower
(AC220~230 V±10%: 1-phase unit)
(AC380~400 V±10%: 3-phase unit)
compressor wiring
- Check the control board
compressor wiring
- Compressor winding short circuit
of the compressor is not connected, it stops due
to an anomaly in the position detection
- Replace the control board of the inverter
In the event of a short circuit, replace the com-
pressor
correctly for each Hydrobox
TOSHIBA I 47 I 47
TOSHIBA