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[7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ]
7-3
Error Code Definitions and Solutions: Codes [1000 - 1999]
7-3-1
Error Code [1102]
1. Error code definition
Discharge temperature fault
2. Error definition and error detection method
1) If the discharge temperature of 120 °C [248°F] or more is detected during the above operation (the first detection), the outdoor
unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically.
2) If the discharge temperature of 120° C [248°F] or more is detected again (the second detection) within 30 minutes after the
second stop of the outdoor unit described above, the mode will be changed to 3 - minute restart mode, then the outdoor unit
will restart in 3 minutes.
3) If the discharge temperature of 120°C [248°F] or more is detected (the third detection) within 30 minutes after the stop of the
outdoor unit described above (regardless of the first or the second stop), the outdoor unit will make an error stop, and the error
code "1102" will be displayed.
4) If the discharge temperature of 120°C [248°F] or more is detected more than 30 minutes after the previous stop of the outdoor
unit, the detection is regarded as the first detection, and the operation described in step 1 above will start.
5) For 30 minutes after the stop (the first stop or the second stop) of the outdoor unit, preliminary errors will be displayed on the
LED display.
3. Cause, check method and remedy
(1)
Gas leak, gas shortage
(2)
Overload operation
(3)
LEV failure on the indoor unit
(4)
BC controller LEV malfunction
Cooling only : LEV3
Cooling main : LEV1,3
Heating only or heating main : LEV3
Defrost : LEV3
(5)
BC controller SVM1 and 2 malfunction
→ Cooling only or defrost
(6)
BC controller SVA malfunction
→ Cooling only or cooling main
(7)
BC controller SVB malfunction
→ Heating only or heating main
(8)
Solenoid valve actuation failure (SV4a,
SV4b, or SV4d)
→heating only, heating main
(9)
Port address setting error.
(10)
Closed ball valve
(11)
Outdoor fan (including fan parts) failure, mo-
tor failure, or fan controller malfunction
Rise in discharge temp. by low pressure
drawing for (3) - (11).
(12)
Gas leak between low and high pressures
(4-way valve failure, Compressor failure, So-
lenoid valve (SV1a) failure)
(13)
Thermistor failure
(TH4)
(14)
Input circuit failure on the controller board
thermistor
HWE13080
Cause
Check method and remedy
Refer to the following page(s).[6-9 Evaluating and Adjusting
Refrigerant Charge](page 161)
Check operating conditions and operation status of indoor/
outdoor units.
Perform a heating operation and check the operation.
Cooling: LEV on the indoor unit
BC controller
Heating: LEV on the indoor unit
BC controller
Refer to the following page(s). [8-8 Troubleshooting LEV
Problems](page 273)
Confirm the port address of the indoor unit.
Confirm that the ball valve is fully open.
Check the fan on the outdoor unit.
Refer to the following page(s). [8-7 Troubleshooting Outdoor
Unit Fan Problems](page 272)
Perform a cooling or heating operation and check the opera-
tion.
Refer to the following page(s). [7-7-2 Error Codes [5104,
5105, 5106, 5107, 5109, 5111]](page 211)
Check the inlet air temperature on the LED monitor.
- 180 -
LEV1,3
SVM1,2
SVA,C
LEV3
SVB
SV4a, SV4b, SV4d
GB
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Troubleshooting
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Do you have a question about the PURY-HP72 and is the answer not in the manual?
Questions and answers
what is the set up mode for recovery, and charging of sys?
Why can control my indoor unit with centralize control
You may not be able to control your Mitsubishi Electric PURY-HP72 indoor unit with centralized control for the following reasons:
1. The power jumper connector on the outdoor unit may not be correctly set. It should be connected to CN40 on only one outdoor unit.
2. The central control switch (SW5-1) on the control board of all outdoor units must be set to "ON."
3. Address settings may not be correctly configured. The main indoor unit should be assigned the smallest address (e.g., IC00), and correct port number settings are required.
4. If using a remote controller alone, an interlock setting from the remote controller is needed.
5. Both ME and MA remote controllers cannot be connected to the same indoor unit group.
6. System controller power issues may occur if the outdoor unit fan rotates due to external forces, causing the system controller to detect an error.
7. Improper wiring or incorrect voltage at TB7 may also prevent operation.
Check each of these conditions to ensure proper centralized control.
This answer is automatically generated
Why can’t control indoor unit with centralize control and stay the MA control set up can’t. Control the mode
The Mitsubishi Electric PURY-HP72 indoor unit cannot be controlled with centralized control and the mode control setup does not function due to the following reasons:
1. Central control is not possible if the indoor/outdoor transmission line is used, even if TB7 terminals are daisy-chained.
2. Shielded cables must be used, and the connection must only be made after confirming the voltage is below 20 VDC.
3. Improper connection of the transmission line for centralized control, such as not correctly daisy-chaining terminals M1 and M2 or not short-circuiting the earth and S terminals on TB7.
4. If a power supply unit is not connected to the centralized control line, the power jumper connector must be moved from CN41 to CN40 on one outdoor unit—if this is not done, mode control will not function.
5. Overlapped indoor unit addresses or noise interference on the remote controller lines can also prevent proper control.
6. Failure to set one MA remote controller to MAIN or exceeding its capacity can result in control failure.
All these factors must be correctly configured for centralized and mode control to function properly.
This answer is automatically generated