5.3 Failure code table for plug-in type PCB
20
Protection/Failure
Wire
controller
E3/EE3
No display
Check Solution
P1/PP1
1. Ch eck the conne ction o f inlet w ater
sensor.
.2. C heckif thesensor isbroken
1. Reconnect the sensor.
2. Rep lace th e senso r.
P2/PP2
1. Checkthe connection ofoutlet water
sensor.
.2. Check ifthe sensor isbroken
1. Reconnect thesensor.
2. Replace thesensor.
P3/PP3
1. Ch eck the co nnect ion of co il 1
temperature sensor.
.2. Check ifthe sensoris broken
1. Reconnect thesensor.
2. Replace thesensor.
P10/PP10
1. Ch eck the co nnect ion of co il 2
temperature sensor
2. Check ifthe sensoris broken.
1. Reconnect thesensor.
2. Replace thesensor.
P5/PP5
1. Ch eck the co nnect ion of am bient
temperature sensor.
.2. Check ifthe sensoris broken
1. Reconnectthe sensor.
2. Replace thesensor.
E12/EE12
1. Checkif wiring connectionof flow switch
is incorrect position.
2. Checkif enough waterflow.
3. Checkif flow switchis broken.
4. Check ifwater pump is working.
1. Reconnect the wiring.
2. Increase enough water flow.
3. Replace flow switch.
4. Repair or replace water pump.
E4/EE4
1. Che ck if high pressure switch is broken.
'2. Checkifthere sjaminwatercircuitor
waterflow n otenough.
3. Ch eckif refrigerantcircuit ja m.
E14/EE14
1. Check if thereis enough water flow volume.
2. Chec k if inle t/o utl et water temp sensor is working..
1. In crease w ater fl ow.
2. Rep lace re lated se nsor.
E8/EE8
Che ck the con necti on
Reconnect the connection wire.
P7/PP7
No action required
Water flow switch failure
Defrosting
Inl et water t emp. se nsor fai lure
Out let wate r temp. s ensor fa ilure
Coi l 1 temp. se nsor fa ilure
Coi l 2 temp. se nsor fa ilure
Ambient temp. sensor failure
Anti-freeze protection for cooling
High pressure protection Ⅰ
Failure of excessive temp. difference
bet ween wat er inlet & o utlet
Communication failure
Winter anti-freeze protection Ⅰ
Winter anti-freeze protection Ⅱ
P7/PP7
No action required
Orde r of phas es inco rrect
Reconnect thephases inright order
Orde r of phas es inco rrect
(on ly for 3 pha se mode l)
E1/EE1
1. Ch eck if hig h or low pressure switch is broken.
2.Checkiflackofrefrigerant.
3. Ambienttemp. and waterinlet temp.is
too low.
E6/EE6
Low pressure protection Ⅱ
High pressure protection Ⅱ
E5/EE5
1. Replace high pressure switch.
2. Remove cause of blockage or
increase water flow.
3. Send heat pump to dealer for
detailed check.
Low pressure protection Ⅰ
E2/EE2
1. Replace l ow pressure swit ch.
2. Fill up with enough refrigerant.
3. Remove cau se of blockage or
decreas e water flow.
4. Send he at pump to dealer for
detailed check.
1. Check ifthere isany jam inthe watercircuit.
2. Checkif the waterflow volumeis enough.
3. Check ifthe waterpump isworking.
E14/EE14
1. Rem ove the j am.
2. Increase thewater flowvolume.
3. Repair orreplace thew aterp ump.
Protection for excessive temp. difference
between water inlet & outlet