Table of Contents
[ VIII Control ]
[3] Operation Flow Chart
1. Mode determination flowchart
(1) Indoor unit (cooling, heating and fan modes)
Start
Breaker
turned on
Operation SW
turned on
NO
1. Protection function
self-holding cancelled.
2. Indoor unit LEV fully closed.
Remote controller
display lit off
FAN stop
*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 operation will be prohibited when the set cooling/heating mode is different from that of the outdoor unit.
*Note 4. The conditions for switchover between the Fan and Heating modes during the fan operation is as follows:
SW1-7 is set to ON.
Fan mode to Heating mode: Outdoor intake temperature ≤ 5˚C
Heating mode to Fan mode: Outdoor intake temperature ≥ 6˚C
(If SW1-7 is set to OFF, the unit will not switch over to the Heating mode.)
HWE10190
NO
YES
From outdoor unit
1
YES
*Note 1
*Note 2
NO
Error mode
YES
Error stop
Cooling mode
Error display
Self-holding of
protection function
Error command
to outdoor unit
Cooling mode
Indoor unit LEV
fully closed.
Display of
*Note 1
cooling mode
Cooling operation
Refer to 2-(1).
Normal operation
Error
Unit in the stopped state
Operation mode
*Note 4
YES
Indoor unit return
air temp ≤ 5˚C
NO
Heating mode
Display of
heating mode
*Note 3
YES
Prohibited
Prohibited
NO
NO
Heating operation
Refer to 2-(2).
Operation command to outdoor unit (to 2 )
- 102 -
Fan mode
*Note 4
YES
Indoor unit return
air temp ≤ 5˚C
NO
Heating mode
Display of
Display of
Fan mode
heating mode
YES
Prohibited
Fan operation
Heating operation
Refer to 2-(2).
"Prohibit" blinks
on the remote
controller.
*Note 3
YES
NO
"Prohibit" blinks
on the remote
controller.
GB
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