CLIVET WSAN-YMi 101, Instruction Manual For Installation, Use And Maintenance, Page: 75 / 128

ERROR
CODE
MALFUNCTION OR PROTECTION FAILURE CAUSE AND CORRECTIVE ACTION
P0 Low pressure protection
1. System is lack of refrigerant volume. Charge the refrigerant in right volume.
2. When at heating mode or heat water mode, Heat exchanger is dirty or
something is block on the surface. Clean the heat exchanger or remove the
obstruction.
3. The water flow is low in cooling mode.
4. Electrical expansion valve locked or winding connector is loosen. Tap-tap
the valve body and plug in/ plug off the connector for several times to make
sure the valve is working correctly. And install the winding in the right
location.
P1 High pressure protection
Heating mode, DHW mode:
1. The water flow is low; water temp is high, whether there is air in the water
system. Release the air.
2. Water pressure is lower than 0.1Mpa, charge the water to let the pressure in
the range of 0.15~0.2Mpa.
3. Over charge the refrigerant volume. Recharge the refrigerant in right
volume.
4. Electrical expansion valve locked or winding connector is loosen. Tap-tap
the valve body and plug in/ plug off the connector for several times to make
sure the valve is working correctly. And install the winding in the right
location
DHW mode: Water tank heat exchanger is smaller than the required 1.7m
2
.
(10-16kW unit)or 1.4m
2
(5-9kW unit)
Cooling mode:
1. Heat exchanger cover is not removed. Remove it.
2. Heat exchanger is dirty or something is block on the surface. Clean the
heat exchanger or remove the obstruction.
P3 Compressor overcurrent protection.
1. The same reason to P1.
2. Power supply voltage of the unit is low, increase the power voltage to the
required range.
P4
High discharge temperature
protection.
1. The same reason to P1.
2. System is lack of refrigerant volume. Charge the refrigerant in right volume.
3. TW_out temp sensor is loosen Reconnect it..
4. T1 temp sensor is loosen. Reconnect it.
5. T5 temp sensor is loosen. Reconnect it.