Toshiba A09-01P manual Outdoor Fault Diagnosis, Check of the current abnormal status

Quick Reference Guide - Page 31

Outdoor Fault Diagnosis

You can perform fault diagnosis of the outdoor unit with the LED's on the P.C. board of the outdoor unit in addition to check codes displayed on the wired remote controller of the hydro unit.

Use the LED’s and check codes for various checks.

Check of the current abnormal status

1.Check that DIP switch SW803 is set to all OFF.

2.Jot down the states of LED800 to LED804. (Display mode 1)

3.Press SW800 for at least one second. The LED status changes to display mode 2.

4.Check the code whose display mode 1 equals the jotted LED status and display mode 2 equals the current flashing status of LED800 to LED804 from the following table to identify the cause.

Check of the abnormal status in the past although the abnormal status is not occurred now.

1.Set bit 1 of DIP switch SW803 to ON.

2.Jot down the states of LED800 to LED804. (Display mode 1)

3.Press SW800 for at least one second. The LED status changes to display mode 2.

4.Find an error whose display mode 1 equals the jotted LED status and display mode 2 equals the current flashing status of LED800 to LED804 from the following table to identify the error.

• An outside air temperature (TO) sensor error can be checked only while an error occurs.

			DISPLAY MODE 1					DISPLAY MODE 2
No.	Cause	D800	D801	D802	D803	D804	D800	D801	D802	D803	D804
1	Normal	●	●	●	●	●	●	●	●	●	●
2	Discharge sensor (TD) error	○	○	●	●	○	●	●	◎	●	●
3	Heat exchanger sensor (TE) error	○	○	●	●	○	●	◎	◎	●	●
4	Heat exchanger sensor (TL) error	○	○	●	●	○	◎	◎	◎	●	●
5	Outside air temperature sensor (TO)	○	○	●	●	○	●	●	●	◎	●
	error
6	Suction sensor (TS) error	○	○	●	●	○	●	●	◎	◎	●
7	Heat sink sensor (TH) error	○	○	●	●	○	◎	●	◎	◎	●
8	Outdoor temperature sensor (TE/TS)	○	○	●	●	○	◎	◎	◎	◎	●
	connection error
9	Outdoor EEPROM error	○	○	●	●	○	◎	◎	◎	◎	◎
10	Compressor lock	●	●	○	●	○	◎	●	●	●	●
11	Compressor lock	●	●	○	●	○	●	◎	●	●	●
12	Current detect circuit error	●	●	○	●	○	◎	◎	●	●	●
13	Thermostat for compressor activated	●	●	○	●	○	●	●	◎	●	●
14	Model data not set (on the service P.C.	●	○	○	●	○	●	◎	●	◎	●
	board)
15	MCU-MCU communication error	●	○	○	●	○	◎	●	◎	◎	◎
16	Discharge temperature error	○	○	○	●	○	◎	◎	●	●	●
17	Abnormal power (open phase detected	○	○	○	●	○	◎	●	◎	●	●
	or abnormal voltage)
18	Heat sink overheat	○	○	○	●	○	◎	◎	◎	●	●
19	refrigerant leak detected	○	○	○	●	○	◎	◎	◎	◎	●
20	4-way valve reverse error	○	○	○	●	○	◎	◎	●	●	◎
21	High pressure release operation	○	○	○	●	○	●	●	◎	●	◎
22	Outdoor fan motor error	○	○	○	●	○	●	◎	◎	●	◎
23	Compressor driver short circuit	○	○	○	●	○	●	◎	●	◎	◎
	protection
24	Position detect circuit error in one-line	○	○	○	●	○	◎	●	◎	◎	◎
	display
		○	: ON		●	: OFF		◎	: FLASHING