Self Check - Mitsubishi Electric PFAV-P250-500-750VM-E Operation Manual

Error codes for which emergency operation is possible (common to OC and OS)
Error codes for which
Failure location emergency operation is
possible
0403
4220, 4225
4230, 4235
Compressor
4240, 4245
Fan motor
Inverter 4250, 4255
5110
5301, 5305
TH2 5102
TH3 5103
TH4 5104
Thermistor
TH5 5105
TH6 5106
TH7 5107
* Capacity is reduced during emergency operation.
(2) Ending Emergency Operation
[End conditions]
If any of the conditions below are satisfied, emergency operation ends and an
emergency stop is performed.
1 When the compressor operation time (accumulated) in the cooling mode
has exceeded 4 hours or more.
2 When the compressor operation time (accumulated) in the heating mode
has exceeded 2 hours or more.
3 When an error for which emergency operation is not possible is detected.
[Control when/after emergency operation ends]
• When/after emergency operation ends, stop the compressor, transmit the
error code again and display error code on the remote controller.
• If the error is reset again when emergency operation ends, retry starts again
and repeat the operation of (1) in the previous section.
• After the error is resolved, perform a power supply reset in order to end
emergency operation and perform normal operation.

3.9. Self Check

Retrieve the error history of each unit using the remote controller.
1 Switch to the self check mode.
When the [CHECK] button is pressed twice successively within three
seconds, the display shown below appears.
Self check address or self check refrigerant address
3 Self check result display <Error history> (For the contents of the error code, refer to the indoor unit installation manual or service handbook.)
4 Error history reset
The error history is displayed in 3 Self check results display.
Error code details
Serial communication error
Bus line voltage drop error
Heat sink overheat protection
Overload protection
Overcurrent shutdown error
Heat sink temperature sensor error
(THHS)
Current sensor/Circuit error
Sub-cool heat exchanger bypass
outlet temperature sensor error
Pipe temperature sensor error
Outlet temperature sensor error
Accumulator inlet temperature sensor
error
Sub-cool heat exchanger liquid outlet
sensor error
Outside air temperature sensor error
Error code 4 digits
<When there is no error history>
ERROR CODE
2. In Case of Communication Circuit Failure or
Power OFF Error with Some Outdoor Units
• When there is a communication circuit failure or power OFF error with some
outdoor units, emergency operation is possible with outdoor units that are still
working normally.
(1) Starting Emergency Operation Mode
(1-1) In case of OC failure
1 Communication error occurs.
appear on the remote controller.
2 Reset the error and start emergency operation with the remote controller.
Precautions for Servicing
* When an OC failure occurs, the OS temporarily becomes the OC and
performs emergency operation. The connection information of the indoor
units also changes during that time.
* In the case of a system that has a billing function, a message such as
"Discrepancies with Billing System Information" may be displayed in
TG-2000A, but there is no need to change (set) the refrigerant system
information on the TG-2000A side. (Do not change the information because
the emergency mode is just temporary.) The connection information also
recovers to normal when emergency operation ends.
(1-2) In case of OS Failure
1 Communication error occurs.
approximately 6 minutes.
<Error codes for which emergency operation is possible (common to OC
and OS)>
Error codes for which
Failure location emergency operation is
Control board failure or outdoor
unit power OFF error
* Capacity is reduced during emergency operation. (Capacity varies
depending on the number of outdoor units that have failed.)
(2) Ending Emergency Operation
[End condition]
When communication recovers, emergency operation ends and the mode
becomes normal mode.
2 Set the address or refrigerant address No. you want to self check.
When the [ TEMP. ( ) and (
decreases and increases between 01 and 50 or 00 and 15. Set it to the
address No. or refrigerant address No. you want to self check.
Approximately three seconds after the change operation, the self check
refrigerant address changes from flashing to a steady light and self check
begins.
Address 3 digits
<When opposite side does not exist>
ERROR CODE
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Detected error location and error code
Emergency operation starts after
Error code details
possible
6607 No ACK error
6608 No response error
)] buttons are pressed, the address
15