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Error code
Item
(Hexadecimal)
61(Note3)
Low pressure error 1 (Note 6)
62(Note3)
Low pressure error 2 (Note 6)
Compressor discharge gas
63
overheat protection operation
Compressor suction gas
64(Note3)
temperature protection operation
65
Insufficient refrigerant error
Compressor operation out of range
66
error
67
Compressor unstarted failure
71
Expansion valve 1 error
72
Expansion valve 2 error
73
Four-way valve error (Note 5)
74
Equalizer valve error
75
Refrig injection line failure
7A
Cooling fan error
Compressor PWM
A0
IGBT short circuit error
Compressor PWM
A1
position detection circuit error
Compressor PWM
A2
current sensor error
Compressor PWM
A3
compressor lock error
Compressor PWM
A4
compressor breakdown error
Compressor PWM
A5
compressor system error
Compressor PWM
AC
heat sink overheating error
Compressor PWM
AD
temperature sensor short circuit error
Compressor PWM communication
AF
error
B0
Compressor PWM voltage error
B1
Compressor PWM board error
C2
Fan inverter overload error
C4
Fan inverter breakdown error
C5
Fan inverter synchronization error
C6
Fan inverter board error
CC
Fan inverter heat sink overheat error
CD
Fan inverter phase loss error
CE
Fan inverter voltage error
CF
Fan inverter communication error
Compressor PWM converter
F0
protection operation
F1
DIPSW setting error
Note 1: Only models with an internal inverter pump provide protection against pump inverter errors.
Note 2: If communication continuously fails for two minutes, only the applicable module stops. The module recovers automatically when
communication returns to normal.
Note 3: If the EEV 1 control board fails, the A and B circuits stop, and if the EEV 2 control board fails, the C and D circuits stop.
Note 4: Relative humidity sensor abnormality is limited to 60HP (Powerful heating type) MC built-in module only.
Note 5: For thermistor abnormalities (coil temperature) and four-way valve problems, protection control is provided for the heat pump module
only. Protection control is not provided to the cooling-only module.
Note 6: "Low pressure error 1" is triggered within five minutes after the compressor start-up. In other cases, "Underpressure 2" applies.
Note 7: For a description of the causes of errors and their solutions, see "13. Operational Guidelines" in this material.
Note 8: For a list of MC error codes, see "13. Operational Guidelines" in this material.
Description
During operation, low pressure of 0.45 MPa or less is sustained for one
minute, or low pressure is 0.12 MPa or less
During operation, the state of evaporation temperature of -6ºC or lower
(changes depending on chilled/warm water outlet water temperature)
continues for 30 seconds after the lapse of a certain time from the start of
the compressor
Compressor discharge gas temperature at 120ºC or more
During cooling operation, one minute after compressor starts and
compressor suction gas temperature is -5ºC or less
Condensation pressure is 0.17 MPa or less
If condensation pressure or evaporation pressure is outside the operating
range of the compressor continuously for 30 seconds
(fluctuates depending on the condition)
Detects compressor malfunction
Expansion valve 1 is fully close and suction gas super heat is less than
3.0ºC continuously for 10 minutes.
Expansion valve 2 is fully close and suction gas super heat is less than
3.0ºC continuously for 10 minutes.
Error in relationship of magnitude relation among discharge gas
temperature, suction gas temperature and coil gas temperature
continues for 5 minutes.
If there is a difference between the high pressure and the low pressure
after the compressor stops
Detects abnormalities in the injection 2-way valve or injection expansion
valve
(1) Heat sink temperature is 95ºC or higher,
or reactor temperature is 130ºC or higher
(2) Heat sink temperature is 90ºC or higher, or the reactor temperature is
110ºC or higher, with the current limit being less than 50% of the
maximum current. Error occurs.
Compressor PWM detects short circuit of IGBT
Compressor PWM detects CT error.
Compressor PWM detects CT error.
Compressor PWM detects compressor lock
Compressor PWM detects compressor motor current error.
While compressor PWM is being powered, rotor is detected to have
stopped.
Compressor PWM detects that the heat sink temperature is 110 ℃ or
higher.
Compressor PWM detects heat sink sensor short circuit.
There is no response from PWM to EEV for more than 6 seconds.
Compressor PWM detects DC voltage error.
Compressor PWM board error is detected.
Fan inverter detects overload.
Fan inverter detects fan motor current error.
Fan inverter detects fan speed error.
Fan inverter board error is detected.
Fan inverter detects heat sink temperature error.
Fan inverter detects power phase loss.
Fan inverter detects DC voltage error.
There is no response from CPU board to fan inverter for more than 6
seconds.
Compressor PWM detects converter error.
Difference between the voltage setting SW5-8 and the actual voltage is
detected.
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Stop process
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Changes depending on the setting
Applicable module
Changes depending on the setting
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