Operation Flow Chart - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[5-4 Operation Flow Chart ]

5-4

Operation Flow Chart

1. Mode determination flowchart
(1) Indoor unit (cooling and fan mode)
Start
Breaker
turned on
Operation SW
turned on
1. Protection function
self-holding cancelled.
2. Indoor unit LEV fully closed.
Remote controller
display lit off
YES
Auxiliary heater
ON
1. Auxiliary heate OFF
FAN stop
2. Low fan speed for
1 minute
YES
Drain pump
ON
3-minute
drain pump ON
*Note 1. Indoor unit LEV fully closed : Opening 41.
*Note 2. The system may go into the error mode on either the indoor unit or the outdoor unit side. If some of the indoor units are
experiencing a problem (except water leakage), only those indoor units that are experiencing the problems will stop.
If the outdoor unit is experiencing a problem, all connected indoor units will stop.
*Note 3. The fan stops only when there is a problem with the fan.
24
- chapter 5
NO
YES
From outdoor unit
1
YES
NO
*Note 1
*Note 2
NO
Error mode
YES
Error stop
NO
Error display Cooling mode
*Note 3
Self-holding of
Cooling display
protection function
Error command
to outdoor unit
Indoor unit LEV
NO
fully closed.
*Note 1
Cooling operation.
Operation mode
Heating mode
Heating display
YES YES
Prohibition Prohibition
NO NO
Refer to 2-(2)
Refer to 2-(1)
Heating operation. for dry operation.
Prohibition
"Blinking display on
the remote controller"
Operation command to outdoor unit (to
Normal operation
Error
Unit in the stopped state
Dry mode
Fan mode
Dry display
Fan display
*Note 3
YES
Prohibition
NO
Refer to 2-(3)
Fan operations
2
)
BS_05_C