Toshiba MMU-AP0091H service manual Central control mode 1 Cannot operate

No.	Item	Outline of specifications	Remarks
15	“ ” and “ ”	<Operation standby> .......... Display on remote controller	• “ ” goes on.
	display	(1) • “P05” is one of displays of power wire missing.
	(Operation and	• “P05” of power cable is detected.
	heating stand-by)
		• “COOL/DRY” operation cannot be performed because the
		other indoor unit is under “HEAT” operation.
		• “HEAT” operation cannot be performed because COOL
		priority is set (Outdoor I/F P.C. board SW11 1-bit is ON)
		and the other indoor unit is under “COOL/DRY” operation.
		• “FAN” operation cannot be performed because the system
		performs “Heat oil/Refrigerant recovery” operation.
		• There is a unit in which indoor overflow “P10” is detected.
		• There is a unit in which interlock alarm “P23” is detected.
		(2) The above indoor units unavailable to operate waits under
		condition of thermostat OFF.	• “ ” goes on.
		<HEAT standby> .................. Display on remote controller

(1)• HEAT thermostat is OFF.

•During HEAT operation, the fan rotates with lower air speed than one specified in order to prevent discharge of cold draft or stops. (including case that defrost operation is being performed)

•“HEAT” operation cannot be performed because COOL priority is set (Outdoor I/F P.C. board SW11 bit 1 is ON) and the other indoor unit is under “COOL/DRY” operation.

(2)“HEAT standby” is displayed until the above conditions are released.

16 Selection of	(1) The contents which can be changed on the remote controller
central control	at indoor unit side can be selected by setup at the central
mode	controller side.
	(2) In case of operation from TCC-LINK central controller
	(TCB-SC642TLE, etc.)
	[Central control mode 1] : Cannot operate
	[Central control mode 2] :
	Cannot operate, stop, select mode, set up temp.
	[Central control mode 3] :
	Cannot select mode, set up temp.
	[Central control mode 4] : Cannot select mode	If operation is performed
	(3) RBC-AMT21E (Wired remote controller)
		from the remote
	While mode is the central control mode, “ CENTRAL”
		controller “CENTRAL
	lights on the display part of the remote controller.	CONTROL” mode, the
		status is notified with
		receiving sound.

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