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[8-11 Troubleshooting Inverter Problems (YKMU) ]
8-11-9
Checking the Fan Inverter for Damage with Load
Items to be checked
(1)
Turn off breaker.
(2)
Turn on breaker.
(3)
Operate unit.
8-11-10
Checking the Installation Conditions
Items to be checked
(1)
Check refrigerant charge.
(2)
Check outdoor unit branch in-
stallation.
HWE13080
Phenomena
1)
After operation, electrical overload error
or position detection error and unit stops
within 10 seconds.
Check code: 4255, 5305
Detail code: 101, 132
2)
RPM error before stat-up
Check code: 5305
Detail code: 134
3)
Electrical current overload error during
operation
Check code: 4255
Detail code: 101
4)
Sensor error during operation
Check code: 5305
Detail code: 132, 133
5)
Voltage overload error
Check code: 4225
Detail code: 109
6)
Load short circuit
Check code: 4255
Detail code: 105
7)
After RPM has stabilized, voltage unbal-
ance of 5%, or 5V.
Phenomena
Overcharge of refrigerant
The branch approach <500 mm.
Is the branch angle < ±15° to horizontal? Make branch angle < ±15°
- 303 -
Remedy
Check for fan motor lock.
→If locked, change for fan mo-
tor.
If the same error is still present
after changing fan motor, change
INV board.
→If not locked, refer to 3) & 4).
Change Fan board if the same
error occurs after restart.
a. Check for gusts or windy conditions.
b. Go to 8-11-6 if not windy.
c. After checking 8-11-6 , and there is
no problem, change Fan board.
d. If replacing Fan board doesn't re-
solve issue, change fan motor.
a. Check for gusts or windy conditions.
b. If no issues with wind, but the error
is still present, change Fan board.
c. Change fan motor if Fan board
change doesn't resolve issue.
a. Check for gusts or windy conditions.
b. Change Fan board if it is not windy.
a. Check 8-11-7 and 8-11-8. If no
problem, then check wiring for short
circuit.
b. If there is no problem with item a.
above, change fan motor.
c. If same error after motor change,
change Fan board.
a. If voltage is unbalanced, go to 8-11-
6.
b. After checking 8-11-6, and there is
no problem, change Fan board.
c. If replacing Fan board doesn't re-
solve issue, change fan motor.
Remedy
Return to correct refrigerant
charge.
Make branch approach >500mm
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