Mitsubishi Electric PURY-P200 Service Handbook page 100

< Initial start-up control of P450-P650 type units: Time chart >
[Example1]
No.1 compressor
ON/OFF
No.2 compressor
ON/OFF
<Restrictions under heating initial start-up mode>
When the compressor discharge (SH) is low, or the discharge pressure is low under heating-only, heating-main,
and cooling-main modes, the capacity total of indoor units which can be operated will be restricted. (other than
when there is only one indoor unit.)
[Capacity total of indoor units which can be operated]
P200 type outdoor unit: P89 type or smaller
P250~P650 type outdoor unit: P139 type or smaller
9. Emergency operation mode (P450-P650 types only)
Emergency operation mode is an operation that the unit runs on a first-aid basis when problems occur with the
compressors (No.1, No.2). It can be started by performing an error reset on the remote controller.
(1) Starting an emergency operation
1 Occurrence of error → error source and error code displays on the remote controller
2 Error reset on the remote controller
3 If the remote controller displays the type of error that allows an emergency operation, (as in above) (refer to
the table below) the unit will begin " retry " operation. (Same usual operation as the operation after error
reset.)
4 When the same type of error is detected during the " retry " operation Item 3 above, perform another error
reset on the remote controller and run an emergency operation suitable for the type of the error.
Pattern of emergency
Error source
operation mode
Problems with No.1
Outdoor
(INV)
unit
Problems with No.2
(2) Finishing the emergency operation mode
[Finishing conditions]
When one of the following conditions is met, emergency operation will end.
1 When an integrated operation time of compressor in cooling mode operation has reached 4 hours.
2 When an integrated operation time of compressor in heating mode operation has reached 2 hours.
3 When an error is detected that does not allow the unit to run an emergency operation.
[Control at the completion of and after an emergency operation]
• To end the operation, stop the compressor and bring up the error code on the display on the remote
controller.
• If another error reset is performed upon finishing an emergency operation, the unit will run a " retry "
operation again and will repeat the procedures 1 through 4 under section (1) above.
• To finish an emergency operation and to run a current-carrying operation after correcting the error, perform
a power reset.
40 minutes
Step 1
Codes of the errors that allow
an emergency operation
Heatsink thermistor 4230
<Inverter error>
Over-current break 4250
Overload protection 4240
Heatsink overheat protection 4230
Cooling fan error 4260
Bus voltage drop protection 4220
IDC sensor/circuit error 5301
VDC sensor/circuit error 4200
THHS sensor/circuit error 5110
IPM communication error 0403
Over-current protection 4108
- 97 -
Completion of initial start up operation
5 minutes
Step 3
Codes of the errors that do not Operation
allow an emergency operation
Emergency operation with only
No.2 compressor
✻
All errors other than the ones
listed on the left
Emergency operation with
only No.1 compressor
After a " retry " operation, if a
different type of error that is
listed under <Inverter error> on
the left is detected, an
emergency operation is run
after a reset.
→ →
4250 reset retry
→ →
4240 reset
→
emergency operation