47
Error code on LED indicator and running status
■ Characters displayed by the LED indicator are explained in the following table.
■ Codes representing normal operation statuses are explained in the following table.
■ Error code display on LED indicator
Character Content Character Content Character Content Character Content Character Content Character Content
0/O
2
4
6
8
A
1
3
5
7
9
B
Character Content Character Content Character Content Character Content Character Content Character Content
C
E
H
N
R
U
D
F
L
P
T
Y
Code
Status
Code
Status
Code
Status
NULL: standby
HOP: hot water OFF
HOT: hot water ON
REST: reset
DEF: defrosting
Code
Symptoms
Code
Symptoms
Code
Symptoms
ECXX
XX slave communication
failure
ER30
Reserved
ER45
TH6 temperature sensor
malfunction
ER16
Overload of compressor
or fan in #1
ER31
Communication failure
with master unit
ER46
TH7 temperature sensor
malfunction
ER17
Overload of compressor
or fan in #2
ER32
Suction temperature #1
is too high
ER47
TH8 temperature sensor
malfunction
ER18
Overload of pump
ER33
Discharge temperature
#1 is too high
ER48
TH9 temperature sensor
malfunction
ER19
Lack of water flow
ER34
Suction temperature #2
is too high
ER49
TH10 temperature
sensor malfunction
ER20
High pressure of #1
ER35
Discharge temperature
#2 is too high
ER50
TH11 temperature
sensor malfunction
ER21
Low pressure of #1
ER36
Low pressure of #2
ER51
TH12 temperature
sensor malfunction
ER22
Dicharge superheat of
#1 is too low
ER37
Superheat of #2 is too
low
ER52
Low pressure sensor
malfunction of #2
ER23
Dicharge superheat of
#2 is too low
ER38
Refrigerant leakage in
#1
ER53
Low pressure sensor
malfunction of #1
ER24
High pressure of #1
ER39
Refrigerant leakage in
#2
ER54
Memory failure
ER25
Reserved
ER40
TH1 temperature sensor
malfunction
ER55
Water tank temperature
too high/low
ER26
Overload of water
system heater
ER41
TH2 temperature sensor
malfunction
ER56
Water level switch
malfunction
ER27
Ambient temperature too
high/low
ER42
TH3 temperature sensor
malfunction
ER57
EWT/LWT too high
ER28
Reserved
ER43
TH4 temperature sensor
malfunction
ER58
Anti-freezing protection
ER29
Superheat of #1 is too
low
ER44
TH5 temperature sensor
malfunction
ER60
No system can start up