CLIVET WSAN-YMi 101, Instruction Manual For Installation, Use And Maintenance, Page: 74 / 128

ERROR
CODE
MALFUNCTION OR
PROTECTION
FAILURE CAUSE AND CORRECTIVE ACTION
H7 Main circuit voltage failure
1. Check that the power supply values are in the available range.
2. The unit was turned on and off several times at close intervals. Keep the unit
turned off for at least 3 minutes before turning it on again.
3. Defective circuit in the main control board. Replace the main PCB.
H8 Pressure sensor error
1. The pressure sensor connector is loose. Re connect it.
2. The pressure sensor has failed. Replace it.
H9 Tw2 sensor error
1. The sensor connector is loosen. Re connect it.
2. The sensor connector is wet or there is water in. remove the water, make the
connector dry. Add waterproof adhesive
3. The sensor failure, change a new sensor.
HA
TW_out plate heat exchanger
water outlet temperature sensor
error.
1. The TW_out sensor connector is loosen. Re connect it.
2. The TW_out sensor connector is wet or there is water in. remove the water,
make the connector dry. Add waterproof adhesive
3. The TW_out sensor failure, change a new sensor.
Hb
the PP protection trips 3 times and
Tw_out <7 ° C
1. see PP
Hd
Communication error between
master and slave unit
1. incorrect address
2. incorrect wiring
3. check board fuse
4. wiring H1-H2
HE
Communication error between
main board and thermostat The outside ambient temperature is too high(higher than 30°C, the unit still operate
heat mode. close the heat mode when the ambient temperature is higher than 30°C
HF Inverter module EEprom error
1. The EEprom parameter is error, rewrite the EEprom data.
2. EEprom chip part is broken, change a new EEprom chip part.
3. Main PCB is broken, change a new PCB.
HH H6 displayed 10 times in 2 hours Refer to H6
HL PFC module fault Contact your local dealer
HP
Low pressure protection
（
Pe<0.6
）
occured 3 times in an
Refer to P0