Kaisai MONO KHC-22RX3, Installation Manual

Page: 148 / 160

65
ERROR
CODE
MALFUNCTION
OR PROTECTION
FAILURE CAUSE
AND CORRECTIVE ACTION
Zone 2 water flow temp. sensor
(Tw2) fault.
1.Check the resistance of the sensor.
2. The Tw2 sensor connector is loosen. Reconnect it.
3.The Tw2 sensor connector is wet or there is water in.
remove the water, make the connector dry. Add waterproof adhesive
4. The Tw2 sensor failure, change a new sensor.
The plate heat exchanger
water outlet temperature
sensor (Tw_out) fault.
1.Check the resistance of the sensor.
2. The TW_out sensor connector is loosen. Reconnect it.
3.The TW_out sensor connector is wet or there is water in.
remove the water, make the connector dry. Add waterproof adhesive
4. The TW_out sensor failure, change a new sensor.
Three times “PP” protection
and Tw_out
＜
7
℃
The same to "PP".
Communication fault between
master unit and slave unit
(in parallel)
1. Address code missing or address code setting duplicate, reset
address code;
2. The connected wire is wrong, reconnect the wire;
3. Chick whether the main board fuse is damaged;
4. Add a network matching wire betewwn the ports H1 and H2 at
the terminal of the communication system;
5. Put the SW9 to “on” of the master unit
；
Communication fault between
main control board of hydrautic
module and Ta / room
thermostart transfer PCB.
1. temperature collecting plate is set effectively, but it is notconnected
with temperature collecting plate.
2. temperature collecting plate connection wire is not connected,
check the connection line and joint
3. Temperature plate damaged, replace it
Inverter module board EE
PROM fault
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.
H6 displayed 10 times in 120
minutes.
Refer to H6
Low pressure protection
（ Pe<0.6 ） occured 3 times
in 1 hour in cooling mode
Refer to 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.
66
ERROR
CODE
MALFUNCTION
OR PROTECTION
FAILURE CAUSE
AND CORRECTIVE ACTION
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 1.7m2.(10-16kW unit)or 1.4m2(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.
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.
Compressor discharge temp.
too high 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.
High Temperature difference
protection between water inlet
and water outlet of the plate
heat exchanger.
1. Check that all shut off valves of the water circuit are completely
open.
2. Check if the water filter needs cleaning.
3. Refer to "9.4 Charging water"
4. Make sure there is no air in the system (purge air).
5. Check on the manometer that there is sufficient water pressure. The
water pressure must be >1 bar(water is cold).
6. Check that the pump speed setting is on the highest speed.
7. Make sure that the expansion vessel is not broken.
8. Check that the resistance in the water circuit is not too high for the
pump. (refer to "10.6 Setting the pump speed" ).
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