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Mitsubishi Electric CRHV-P600YA-HPB Service Handbook page 129

Hot water heat pump
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[ IX Troubleshooting ]
Error
code *1
Error type
(PCB *2)
S
u
t c
o i
n
e t
m
p
e
a r
u t
e r
a f
u
1101
Discharge temperature fault
(A discharge refrigerant temperature of 120ºC or
above is detected for 30 seconds while the
1102
compressor is in operation.)
(A discharge refrigerant temperature of 125ºC or
above is detected momentarily while the compressor
is in operation.)
H
e
t a
e
c x
h
a
n
g
e
f r
e r
e
z
e
u
1503
Low evaporation temperature fault
1512
Inverter
Electric
P I
M
e
error
current
related
4250
errors
101
(
)
during
operation
4250
A
C
C
T
102
(
)
4250
DCCT overcurrent
103
(
)
4250
Overcurrent relay trip (effective
value) (During operation)
107
(
)
4250
Overcurrent relay trip (momentary
value) (During operation)
106
(
)
Short-circuited IPM/ground fault
4250
(During operation)
104
(
)
4250
Overcurrent error due to a short-
circuited (During operation)
105
(
)
Current
IPM error
related
(At startup)
prob-
4250
lems at
101
(
)
start up
4250
ACCT overcurrent
(At startup)
102
(
)
4250
DCCT overcurrent
(At startup)
103
(
)
4250
Overcurrent relay trip (effective
value) (At startup)
107
(
)
4250
Overcurrent relay trip (momentary
value) (At startup)
106
(
)
HWE1312A
t l
T
h
e
h
e
a
the upper limit of the operating range.
No water
Abrupt change in water temperature
(5K/min. or greater)
Pump failure
p
4 *
D
o r
p
n i
supply cutoff
Heat source temperature drop
Drop in heat source flow
Heat source temperature drop
r r
r o
o
v
e
c r
r u
e r
t n
Inter-phase voltage drop
(Inter-phase voltage at or below 180 V)
Cause
(Installation/Setting error)
s t
o
u
c r
e
e t
m
p
e
a r
u t
e r
w
a
s
a
b
o
v
e
• Suction refrigerant temperature
thermistor fault
• High-pressure sensor fault
• Linear expansion valve fault (Main circuit
LEV, injection LEV)
• Injection solenoid valve fault
• Refrigerant deficiency (refrigerant gas
leak)
h
e
t a
s
o
u
c r
e
f
o l
w
r o
h
e
t a
s
o
u
c r
e
•
N I
• Ground fault of the compressor
• Coil problem
• IPM error (loose terminal screws,
cracked due to swelling)
• Items listed under "Heatsink overheat
protection" below
•
N I
• Ground fault of the compressor
• Coil problem
• IPM error (loose terminal screws,
cracked due to swelling)
• Ground fault of the compressor
• IPM error (loose terminal screws,
cracked due to swelling)
• Ground fault of the compressor
• Shorted output wiring
• INV board fault
• Ground fault of the compressor
• Coil problem
• IPM error (loose terminal screws,
cracked due to swelling)
• Items listed under "Heatsink overheat
protection" below
• INV board fault
• Ground fault of the compressor
• Coil problem
• IPM error (loose terminal screws,
cracked due to swelling)
- 122 -
Cause
(Parts problems)
V
b
o
a
d r
a f
u
t l
V
b
o
a
d r
a f
u
t l
Error reset *3
Unit
side
Remote
(PCB)
Operation
SWS1
SW
GB

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