
6. Troubleshooting
6.1 Fault Table
Inlet temp. sensor
failure
P01
The temp. sensor is short
circuit or broken
Check or change the temp
sensor
Outlet temp. sensor
failure
P02
The temp. sensor is short
circuit or broken
Check or change the temp
sensor
P04
The temp. sensor is short
circuit or broken
Check or change the temp
sensor
System 1/2/3/4 Coil
temp. failure
P15(system1), P25(system2),
P35(system3), P45(system4)
The temp. sensor is short
circuit or broken
Check or change the temp
sensor
System 1/2/3/4
absorb temp. failure
P17(system1), P27(system2),
P37(system3), P47(system4)
The temp. sensor is short
circuit or broken
Check or change the temp
sensor
System 1/2/3/4 anti-
freeze temp. failure
P19(system1), P29(system2),
P39(system3), P49(system4)
The temp. sensor is short
circuit or broken
Check or change the temp
sensor
1/2/3/4 Anti-freeze
P191(system1), P291(system2),
P391(system3), P491(system4)
The temp. sensor is short
circuit or broken
Check or change the temp
sensor
System 1/2/3/4 coil
inlet temp. failure
P151(system1), P251(system2),
P351(system3), P451(system4)
The temp. sensor is short
circuit or broken
Check or change the temp
sensor
System 1/2/3/4 high
pressure protection
E11(system1), E21(system2),
P31(system3), E41(system4)
The high-pressure switch is
broken
Check the pressure switch and
cold circuit
System 1/2/3/4 low
pressure protection
E12(system1), E22(system2),
E32(system3), E42(system4)
The low-pressure switch is
broken
Check the pressure switch and
cold circuit
Water flow failure E03
No water/little water in water
system
Check the pipe waterflow and
water pump
Electric-heater
overheat protection E04 Electrical-heat is overheat Check or change electrical-heat
Water inlet and oulet
temp. too big E06 Water flow is not enough and
low differential pressure
Check the pipe waterflow and
whether water system is
System 1/2/3/4 anti-
freeze protection E06 Water flow is not enough and
low differential pressure
Check the pipe waterflow and
whether water system is
source side anti-
E17(system1), E27(system2),
E37(system3), E47(system4) Water flow is not enough
Check the pipe waterflow and
whether water system is
side anti-freeze
E171(system1), E271(system2),
E371(system3), E471(system4) Water flow is not enough
Check the pipe waterflow and
whether water system is
Anti—freeze protect
level 1
E19 The ambient temp. is low /
Anti—freeze protect
level 2
E29 The ambient temp. is low /
System protection E05 The protection system is failure
Check each protection point of
the system
Communication
Failure E08
between wire controller and
Check the wire connection
between remote wire controller