Over heat
protection
(HTP Switch)
E03
☆☆☆☆☆☆
☆☆
●
(8 flashes 1
dark)
1) Too high tank
water temp
2) The switch
damaged
1) If the tank water temp is
over 85C, the switch will
open and the unit will stop
for protection. After the
water comes to normal
temp,
2) Replace a new switch
Compressor
protection
(out of the
ambient
limit or wa-
ter temp
limit)
PA
☆☆☆☆☆☆
☆☆☆
●
(9 flashes 1
dark)
1) Tank water temp
too high
2) The switch
damaged
1) If the tank water temp is
over 85C, the switch will
open and the unit will stop
for protection. After the
water comes to normal
temp,
2) Replace a new switch
Defrost
De-
frosti
ng
indi-
cate
☆☆☆☆☆☆
☆☆
……(all
long
flashes)
Communi-
cation failure
E08
Bright
1)Disconnect of
communication
line
2)PCB is damaged
1) Check the communica-
tion line
2) Replace the PCB
Electrical
anode failure
E06
☆☆☆☆☆☆
☆☆☆☆☆☆
●
（
12
flashes 1
dark
）
1) Wire discon-
nected
2) Electronic anode
control panel has
poor contact
Electronic anode
control panel
damaged
1) Check the line
2) Check the electronic an-
ode control panel
Replace the Electronic an-
ode control panel
MAINTENANCE
Maintenance activities
In order to ensure an optimum operation of the unit, a number of checks and inspec-
tions on the unit and the field wiring have to be carried out at regular intervals, pref-
erably yearly.
Check the water supply and air vent frequently, to avoid lack of water or air in the
25
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