Mitsubishi Electric CAHV-P500YB-HPB Service Handbook page 125

[ IX Troubleshooting ]
Time of data storage before error
MAIN circuit
Inlet water temp (Twi )
Outlet water temperature (Two)
Discharge refrigerant temperature 1 TH1 Discharge refrigerant temperature 2 TH5
Suction refrigerant temperature 1 TH2 Suction refrigerant temperature 2 TH6
Shell temperature 1 TH3
Air-side heat exchanger inlet
refrigerant temperature 1 TH4
Outside temperature TH9
Inlet water temperature 1 TH16
Outlet water temperature 1 TH11
Representative water temperature 1 TH14
Representative water temperature 2 TH15
High pressure 1 HP1
Low pressure 1 LP1
Heatsink temperature(THHS)
Water temperature setting using an external analog input (4-20 mA Current input)
I u(U-phase current)(Compressor)
I w(W-phase current)(Compressor)
I dc(Bus current)(Compressor)
V dc(Bus voltage)(Compressor)
I u(U-phase current)(Fan)
I w(W-phase current)(Fan)
I dc(Bus current)(Fan)
V dc(Bus voltage)(Fan)
Suction SH (target)
Compressor frequency (actual frequency)
Suction SH
Shell bottom SH
Operating frequency of the fan (actual frequency)
Opening of the LEV on the main circuit
Injection LEV opening
Discharge SH (target)
Discharge SH
Target water temperature
Water temperature setting using an external analog input (0-10 V or 2-10 V Voltage input)
Water temperature setting using an external analog input (1-5 V Voltage input)
(Note1) Each circuit board displays error data of its own unit and not other units.
(Note2) "Before error" is defined as the period between 19 minutes before the occurrence of an error up to immediately before the occurrence of the error.
(Note3) When the input type is selected. When the input type is not selected = 0
HWE15070
Item
SUB circuit
Inlet water temp 2 TH12
Shell temperature 2 TH7
Air-side heat exchanger inlet
refrigerant temperature 2 TH8
Outside temperature TH9
Inlet water temperature 2 TH12
Outlet water temperature 2 TH13
High pressure 2 HP2
Low pressure 2 LP2
Item
LED display
code
MAIN circuit SUB circuit MAIN circuit SUB circuit
c01 First decimal place ○
c02 First decimal place ○
c03 First decimal place ○
c04 First decimal place ○
c05 First decimal place ○
c06 First decimal place ○
c07 First decimal place ○
c08 First decimal place ○
c09 First decimal place ○
c10 First decimal place ○
c11 First decimal place ○
c12 Second decimal place ○
c13 Second decimal place ○
c14 First decimal place ○
c15 First decimal place (Note3)
c16 First decimal place ○
c17 First decimal place ○
c18 First decimal place ○
c19 Integer ○
c20 First decimal place ○
c21 First decimal place ○
c22 First decimal place ○
c23 Integer ○
c24 First decimal place ○
c25 Integer ○
c26 First decimal place ○
c27 First decimal place ○
c28 Integer ○
c29 Integer ○
c30 Integer ○
c31 First decimal place ○
c32 First decimal place ○
c33 First decimal place ○
c35 First decimal place (Note3)
c36 First decimal place (Note3)
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Unit and circuit type
Main unit Sub unit
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Fixed to 0 Fixed to 0 Fixed to 0
Fixed to 0 Fixed to 0 Fixed to 0
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Fixed to 0 Fixed to 0 Fixed to 0
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Fixed to 0 Fixed to 0 Fixed to 0
Fixed to 0 Fixed to 0 Fixed to 0
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