3-53
Check
code
Detected
position
Check
code name
Cause
(Position)
Trouble detection
condition
Check item (Position)
dd
Interface Outdoor
refrigerant
leakage
detection
Outdoor
liquid line
interrupt
circuit
• The status that pressure
value is high was
detected in the stopped
fixed-speed outdoor unit
when the system
operated in COOL mode.
• The status that PMV
opening degree is the
minimum 100P is
continued for a long time
during S.H control while
the system is operated in
HEAT mode.
• Check preceding close operation of outdoor PMV
A (PMV 1 and PMV 2).
• Liquid line check valve
(Cooling only model)
• Check for blockage of gas balance circuit (SV2).
• Check capillary for bypass between fixed-speed
outdoor gas pipe and heat exchange line.
• Check for blockage of oil return circuit (SV3B
peripheral circuits).
1) Blockage of check valve
2) Blockage of capillary
3) Blockage of SV3B
(Check all outdoor units.)
4) Blockage of balancing pipe
(Check pipe between outdoor units.)
• Check for blockage of oil return capillary of oil
separator.
• Check 4-way valve error.
• Check outdoor P.C. board (interface) error.
dE
Indoor
Indoor
address
undefined
During
automatic
indoor
address
There was undefined
address in the indoor
addresses.
*
Wait for a while during display.
When the address is defined, the operation is
automatically reset.
*
If the check code does not disappear 20 minutes
after turning on the power, it is abnormal.
Check the following items.
• Check failure of indoor main P.C. board (MCC-
1361).
• Check communication noise source.
• Check Incorrect set up of jumper on indoor main
P.C. board (MCC-1361)
dF
Interface Outdoor
address
undefined
During
automatic
outdoor
address
There was undefined
address in the outdoor
addresses.
*
Wait for a while during display.
When the address is defined, the operation is
automatically reset.
*
If the check code does not disappear 5 minutes
after turning on the power, it is abnormal.
Check the following items.
• Check indoor P.C. board (interface) error.
• Check communication noise source.
E1
Interface Fixed-
speed high
pressure
SW system
alarm (1)
Fixed-
speed high
pressure
SW system
circuit
(Compress
or 1)
High pressure SW circuit
or IOL, OCR system circuit
operated.
n
When high pressure
Pd
≥
2.5MPa,
[High pressure SW
system error]
1) In case of
compressor 1 :
[E1] is displayed.
2) In case of
compressor 2 :
[F0] is displayed.
n
When high pressure
Pd < 2.5MPa,
[IOL, OCR system error]
1) In case of
compressor 1 :
[E6] is displayed.
2) In case of
compressor 2 :
[F1] is displayed.
• Check high pressure SW error of compressor 1,
and check IOL, OCR operation.
• Check IOL operation of compressor 1 and case
temp. up.
(Check cause of overload operation.)
• Check operation and blockage of SV41 valve.
• Check if service valve is fully open.
• Check outdoor fan operation and connector
connection.
• Check outdoor fan motor and running capacitor
error.
• Check for blockage of outdoor PMV.
1) Refrigerant choke circuit (PMV A)
2) Cooling bypass circuit (PMV B)
3) Liquid line check valve
(Cooling only model)
• Check for blockage of indoor/outdoor hea
exchanger.
• Check Pd pressure sensor error.
• Check for blockage of hot gas bypass SV2 circuit.
• Check outdoor P.C. board (interface) error.
• Check indoor fan error.
(Cause of air volume down)
• Check indoor PMV open valve status.
• Check miswiring between indoor/outdoor
communication line.
