Sanyo AHX1252, UHX2452, UHX0752, UHX1252, UHX3652 Blinking inspection display 1 Automatic backup

Trouble Diagnosis

4. Blinking (Inspection) Display on the Remote Controller

CAUTION

Currently the blinking inspection display can be displayed only on the wired remote controller and system remote controller.

1

2

3

4

5

6

7

8

Blinking inspection display (1) (Automatic backup)

Alarm code	(Blinking	inspection display)
Alarm meaning	Automatic backup is in progress. A/C units can be operated.
	Status: The compressor at one of the outdoor units where the outdoor unit fan is running
	should be operating.
	* Blinking inspection display also occurs when seizing of the compressor magnet SW is
		detected. Because this may also be the case, refer to “Blinking inspection display (2)
	(compressor magnet SW seizing detection).”
Alarm conditions	When alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, correcting the control device
	(remote controller, etc.) input engages this mode.
Probable cause	Because alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, check the alarm history
	then refer to the corresponding items.
Correction	Follow the instructions in the corresponding items to correct the trouble.
Recovery	After repairing the malfunctioning locations, reset the power for the system (all outdoor units).
	Caution: Automatic backup mode will not be canceled until the power is reset.
Notes	Automatic backup mode is not engaged in cases of alarms other than those listed above.
	Reasons: There is no need for automatic backup if recovery is possible by correcting the
		remote controller input.
		With alarms for which automatic recovery is possible (such as sensor alarms), the
		presence of electrical noise may result in a new alarm. Howeve r, it is believed that
		this occurs for a comparatively short time only. In these cases, a mode (automatic
		backup mode) that limits operation may be engaged.
		Control is not possible when a communications system alarm has occurred.
		Automatic backup mode is not engaged in order to avoid causing secondary
		damage.

3-22