Operation Flow Chart - Mitsubishi Electric PUHY-P200 Service Handbook

[3] Operation Flow Chart

1. Flow to determine the mode
(1) Indoor unit (cooling, heating, dry, fan mode)
Start
Breaker
turned on
YES
Operation SW
turned on
NO
1. Protection function
self-holding
cancelled.
2. Indoor unit LEV fully
closed.
Remove controller
display extinguished
YES
Auxiliary heater
ON
NO
1. Auxiliary
FAN stop
heater OFF
2. Fan low speed
for 1 minute
YES
Drain pump
ON
NO
3-minute drain
pump ON
Notes :
❉1 Indoor unit LEV fully closed : Opening 41.
❉2 The error mode includes that of indoor units and outdoor units. At indoor side error (excluding water leak), the indoor unit in
trouble only will be stopped in emergency, while at outdoor side error, all indoor units connected will be stopped.
❉3 Prohibition status is observed when the set cooling/heating mode is different from that of the outdoor unit.
NO
1 From outdoor unit
YES
Note: ❉1
Note: ❉2
NO
Error mode
YES
Error stop
Error display
Cooling mode
Protection func-
Cooling display
tion self-holding
Error command
to outdoor unit
Prohibition
Indoor unit LEV
fully closed
Cooling operation
Refer to 2-(1)
- 76 -
Operation mode
Heating mode
Heating display
Note: ❉3
Note: ❉3
YES
YES
Prohibition
NO
NO
Heating operation
Refer to 2-(2)
Prohibition "Remote
controller blinking"
Operation command to outdoor unit (to 2 )
Normal operation
Trouble observed
Stop
Dry mode
Fan mode
Dry display
Fan display
Note: ❉3
YES
Prohibition
NO
Dry operation
Fan operations
Refer to 2-(3)