Failure Code Table For Plug-In Type Pcb - Midas Mida.Black 8 Installation Instructions Manual

5.3 Failure code table for plug-in type PCB

Wire
Protection/Failure
controller
Inlet water temp. sensor failure
P1/PP1
P2/PP2
Outlet water temp. sensor failure
Coil 1 temp. sensor failure
P3/PP3
Coil 2 temp. sensor failure
P10/PP10
Ambient temp. sensor failure
P5/PP5
E12/EE12 Anti-freeze protection for cooling
Winter anti-freeze protection Ⅰ
P7/PP7
Winter anti-freeze protection Ⅱ
P7/PP7
High pressure protection Ⅰ
E1/EE1
High pressure protection Ⅱ
E5/EE5
Low pressure protection Ⅰ
E2/EE2
Low pressure protection Ⅱ
E6/EE6
E3/EE3 Water flow switch failure
Order of phases incorrect
E4/EE4
(only for 3 phase model)
E8/EE8 Communication failure
Protection for excessive temp. difference
E14/EE14
between water inlet & outlet
Failure of excessive temp. difference
E14/EE14
between water inlet & outlet
No display
Defrosting
Check
1. Check the connection of inlet water
sensor.
.
2. Check if the sensor is broken
1. Check the connection of outlet water
sensor.
.
2. Check if the sensor is broken
1. Check the connection of coil 1
temperature sensor.
.
2. Check if the sensor is broken
1. Check the connection of coil 2
temperature sensor
2. Check if the sensor is broken.
1. Check the connection of ambient
temperature sensor.
.
2. Check if the sensor is broken
No action required
No action required
1. Check if high pressure switch is broken.
'
2. Check if there s jam in water circuit or
water flow n ot enough.
3. Check if refrigerant circuit jam.
1. Check if high or low pressure switch is broken.
2. Check if lack of refrigerant.
3. Ambient temp. and water inlet temp. is
too low.
1. Check if wiring connection of flow switch
is in correct position.
2. Check if enough water flow.
3. Check if flow switch is broken.
4. Check if water pump is working.
Order of phases incorrect
Check the connection
1. Check if there is any jam in the water circuit.
2. Check if the water flow volume is enough.
3. Check if the water pump is working.
1. Check if there is enough water flow volume.
.
2. Check if inlet/outlet water temp sensor isworking
20
Solution
1. Reconnect the sensor.
2. Replace the sensor.
1. Reconnect the sensor.
2. Replace the sensor.
1. Reconnect the sensor.
2. Replace the sensor.
1. Reconnect the sensor.
2. Replace the sensor.
1. Reconnect the sensor.
2. Replace the sensor.
1. Replace high pressure switch.
2. Remove cause of blockage or
increase water flow.
3. Send heat pump to dealer for
detailed check.
1. Replace low pressure switch.
2. Fill up with enough refrigerant.
3. Remove cause of blockage or
decrease water flow.
4. Send heat pump to dealer for
detailed check.
1. Reconnect the wiring.
2. Increase enough water flow.
3. Replace flow switch.
4. Repair or replace water pump.
Reconnect the phases in right order
Reconnect the connection wire.
1. Remove the jam.
2. Increase the water flow volume.
3. Repair or replace the water pump.
1. Increase water flow.
.
2. Replace related sensor.