Mitsubishi Electric QAHV-N560YA-HPB Service Handbook page 136
Hot water heat pump
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Also See for QAHV-N560YA-HPB:
- Installation & operation manual (85 pages) ,
- Data book (46 pages) ,
- Setup manual (62 pages)
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[ IX Troubleshooting ]
2. Diagnosing Problems Using Error Codes
If a problem occurs, please check the following before calling for service.
(1) Check the error code against the table below.
(2) Check for possible causes of problems listed in the "Cause" column that correspond to the error code.
(3) If the error codes that appear on the display are not listed in the table below, or no problems were found with the
items listed in the "Cause" column, please consult your dealer or servicer.
Diagnosing Problems Using Error Codes
Error
code *1
Error type
(PCB *2
RC
M-NET)
0100
U
n
e r
s
t e
r e
o r
s r
P
o
w
r e
a f
u l i
e r
4106
• If a power supply is not detected after the M-NET
254
power supply was turned on, Error code 4106 will
(
)
appear, and the unit will come to an abnormal stop.
4106
Power supply fault
255
(
)
Water flow drop
• If residual operation of the pump does not stop
2613
after a certain period has passed due to a
decrease in flow rate, Error code 2613 will appear.
The unit will remain in operation.
V
a
c
u
u
m
p
o r
e t
t c
o i
n
a f
u
t l
1301
High pressure fault
• After the high-pressure switch has detected
absence of voltage a certain number of times or if it
1302
is detected that the pressure has remained at or
above 14 MPa for 20 seconds or longer, Error code
1302 will appear, and the unit will come to an
abnormal stop.
L
o
w
e
v
a
p
r o
t a
o i
n
e t
m
p
e
1104
Water supply cutoff (Water flow rate sensor)
• If the unit has remained in operation for a certain
2601
duration with the flow rate being low in the unit-side
water circuit, Error code 2601 will appear, and the
unit will come to an abnormal stop.
Secondary side water supply cutoff error
• If the unit has remained in operation for a certain
2601
duration with the secondary-side control being
enabled and the flow rate being low in the
2
(
)
secondary-side water circuit, Error code 2601 and
2602 will appear alternately, and the unit will come
to an abnormal stop.
O
u
l t
t e
w
t a
r e
e t
m
p
e
a r
u t
e r
• If it is detected that the outlet water temperature
has remained at a temperature of 15 degrees or
2138
below the target temperature or a temperature at or
below 50°C for 5 minutes, Error code 2138 will
appear, and the unit will come to an abnormal stop.
HWE1517A
S
o
m
P
o
w
operation switch is switched on.
•
O
minimum usage temperature.
• Sudden frosting or heavy snow has
clogged the heat exchanger.
a r
u t
e r
a f
u
t l
Wat
Water circuit air entrainment, water
strainer clogged
a f
l u
( t
o l
w
e t
m
) p
Cause
(Installation/Setting error)
e
f o
h t
e
r e
o r
s r
h
a
v
e
n
t o
b
e
e
n
e r
s
e
. t
r e
a f
u l i
e r
o
c c
r u
e r
d
w
h
e
n
h t
e
u
s t
d i
e
e t
m
p
e
a r
u t
e r
s i
b
e
o l
w
h t
e
e
f r
o l
w
d
o r
p
- 129 -
Cause
(Parts problems)
• Transmission power board fault
• Water flow control valve fault
• Pump fault
• Low-pressure sensor fault
• Suction refrigerant temperature
thermistor fault
• Electric expansion valve fault on the main
circuit
• Fan motor error/broken motor wire
• Refrigerant shortage (gas leakage)
• Electronic expansion valve fault
• High-pressure sensor fault
• Water flow control valve fault
• Pump fault
•
L
o
w
p -
e r
s s
u
e r
s
e
n
s
r o
a f
u
t l
• Suction refrigerant temperature
thermistor fault
• Electric expansion valve fault on the main
circuit
• Fan motor error/broken motor wire
• Refrigerant shortage (gas leakage)
•
W
a
e t
f r
o l
w
c
o
t n
o r
v l
a
v l
e
a f
t l u
• Pump fault
• Water flow rate sensor
Flow sensor fault, pump fault, motor-
operated valve fault, water flow rate control
valve fault
•
F
a
n
m
t o
r o
e
r r
r o
b /
o r
k
e
n
m
t o
r o
i w
• Refrigerant shortage (gas leakage)
Error reset *3
Unit
side
Remote
(PCB)
Operation
SWS1
SW
e r
GB
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Table of Contents
Troubleshooting
