Table of Contents
Advertisement
[8-1 MA Remote Controller Problems ]
8-1-3
"HO" and "PLEASE WAIT" Do Not Go Off the Screen.
1. Phenomena
"HO" or "PLEASE WAIT" display on the remote controller does not disappear, and no operation is performed even if the button
is pressed. ("HO" or "PLEASE WAIT" display will normally turn off 5 minutes later after the power on.)
2. Cause
1) The power for the M-NET transmission line is not supplied from the outdoor unit. For details, refer to the following page(s).
[8-12-2 Troubleshooting Problems with Outdoor Unit Transmission Power Supply Circuit](page 308)
[8-13-2 Troubleshooting Problems with Outdoor Unit Transmission Power Supply Circuit](page 310)
2) Short-circuited transmission line
3) Incorrect wiring of the M-NET transmission line on the outdoor unit.
Disconnected wire for the MA remote controller or disconnected line to the terminal block.
The indoor transmission line is connected incorrectly to the transmission terminal block for centralized controller (TB7).
The male power supply connectors on the multiple outdoor units are connected to the female power supply switch connector
(CN40).
In the system to which the power supply unit for transmission lines is connected, the male power supply connector is connect-
ed to the female power supply switch connector (CN40) on the outdoor unit
4) Disconnected M-NET transmission line on the indoor unit.
5) Disconnected wire between the terminal block for M-NET line (TB5) of the indoor unit and the indoor unit board (CN2M) or
disconnected connector.
6) Incorrect wiring for the MA remote controller
Short-circuited wire for the MA remote controller
Disconnected wire for the MA remote controller (No.2) and disconnected line to the terminal block.
Reversed daisy-chain connection between groups
Incorrect wiring for the MA remote controller to the terminal block for transmission line connection (TB5) on the indoor unit
The M-NET transmission line is connected incorrectly to the terminal block (TB15) for the MA remote controller.
7) The sub/main setting of the MA remote controller is set to sub. Two PAR-31MAAU controllers are connected.
8) 2 or more main MA remote controllers are connected.
9) Indoor unit board failure (MA remote controller communication circuit)
10) Remote controller failure
11) Outdoor failure (Refer to the following page(s). [8-18 Troubleshooting Problems Using the LED Status Indicators on the Out-
door Unit](page 322))
3. Check method and remedy
When 2) and 3) above apply, check code 7102 will be displayed on the self-diagnosis LED.
Same symptom for all units in a
system with one outdoor unit?
YES
Check the self-diagnosis LED
Is the error code 7102
displayed?
NO
Error found?
NO
Check item 1) in the
"Cause" column.
HWE13080
NO
YES
Check items 2) and 3)
in the "Cause" column.
YES
Replace the ME remote
controller with the MA
remote controller
Correct
the error.
- 253 -
Measure voltages of the
terminal block for transmission
line (TB5) on the indoor unit.
NO
Check item 4) in the
17 - 30V?
"Cause" column.
YES
Check items 5) and 6)
in the "Cause" column.
YES
Error found?
NO
Indoor unit board or
MA remote controller failure
GB
Hide quick links:
Advertisement
Chapters
Table of Contents
Troubleshooting
Need help?
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