Toshiba RAV-SM2804AT7ZG 108, Cause Display mode, Placement location Term Curing manner

– 108 –

Digital Inverter

No.	Cause		Display mode 1					Display mode 2
		D800	D801	D802	D803	D804	D800	D801	D802	D803	D804
1	Normal
2	Discharge (TD) sensor error
3	Heat exchanger (TE) sensor error
4	Heat exchanger (TL) sensor error
5	Outside air temperature (TO) sensor error

6 Suction (TS) sensor error

7 Heat sink (TH) sensor error

8 Outdoor temperature sensor (TE/TS) connection error

9 Outdoor EEPROM error

10 Compressor lock

11 Compressor lock

12 Current detection 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 Gas 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 detection circuit error in one-line display

25 Ps sensor error

26 Ps drop down error

(: OFF : ON : Flashing)

*The LEDs and DIP switches are

located on the lower left of the P.C.	ON	ON
board of the outdoor unit.

1	2	3	4	1		2	3	4
SW804					SW805				Enlarged view of
					ON				LEDs
ON

											D805
1	2	3	4	1	2	3	4
SW802				SW803				SW800 SW801 SW806			D804
									LED		D803
											D802
										D805	D801
										D804
										D803
											D800
										D802
										D801
										D800

Digital Inverter

15 APPENDIX

Work instructions

The existing R22 and R407C piping can be reused for our digital inverter R410A product installations.

WARNING

Confirming the existence of scratches or dents on the existing pipes and confirming the reliability of the pipe strength are conventionally referred to the local site.

Basic conditions needed to reuse existing pipes

Check and observe the presence of three conditions in the refrigerant piping works.

1.Dry (There is no moisture inside of the pipes.)

2.Clean (There is no dust inside of the pipes.)

3.Tight (There are no refrigerant leaks.)

Restrictions for use of existing pipes

In the following cases, the existing pipes should not be reused as they are. Clean the existing pipes or exchange them with new pipes.

1.When a scratch or dent is heavy, be sure to use new pipes for the refrigerant piping works.

2.When the existing pipe thickness is thinner than the specified “Pipe diameter and thickness,” be sure to use new pipes for the refrigerant piping works.

•The operating pressure of R410A is high (1.6 times that of R22 and R407C). If there is a scratch or dent on the pipe or a thinner pipe is used, the pressure strength may be inadequate, which may cause the pipe to break in the worst case.

*Pipe diameter and thickness (mm)

Reference outside	Wall thickness	Material
diameter (mm)	(mm)
6.4	0.8	—
9.5	0.8	—
12.7	0.8	—
15.9	1.0	—
19.1	1.2	—
22.2	1.0	Half hard
28.6	1.0	Half hard

3.When the outdoor unit was left with the pipes disconnected, or the gas leaked from the pipes and the pipes were not repaired and refilled.

•There is the possibility of rain water or air, including moisture, entering the pipe.

4.When refrigerant cannot be recovered

•There is the possibility that a large quantity of dirty oil or moisture remains inside the pipes.

5.When a commercially available dryer is attached to the existing pipes

•There is the possibility that copper green rust has been generated.

6.When the existing air conditioner is removed after refrigerant has been recovered.

Check if the oil is judged to be clearly different from normal oil.

•The refrigerator oil is copper rust green in color: There is the possibility that moisture has mixed with the oil and rust has been generated inside the pipe.

•There is discolored oil, a large quantity of residue, or a bad smell.

•A large quantity of shiny metal dust or other wear residue can be seen in the refrigerant oil.

7.When the air conditioner has a history of the compressor failing and being replaced.

•When discolored oil, a large quantity of residue, shiny metal dust, or other wear residue or mixture of foreign matter is observed, trouble will occur.

8.When temporary installation and removal of the air conditioner are repeated such as when leased etc.

9.If the type of refrigerator oil of the existing air conditioner is other than the following oil (Mineral oil), Suniso, Freol- S, MS (Synthetic oil), alkyl benzene (HAB, Barrel-freeze), ester series, PVE only of ether series.

•The winding-insulation of the compressor may deteriorate.

NOTE

The above descriptions are results have been confirmed by our company and represent our views on our air conditioners, but do not guarantee the use of the existing pipes of air conditioners that have adopted R410A in other companies.

Branching pipe for simultaneous operation system

•In the concurrent twin system, when TOSHIBA has specified that branching pipe is to be used, it can be reused.

Branching pipe model name:

RBC-TWP30E2, RBC-TWP50E2, RBC-TRP100E

On the existing air conditioner for simultaneous operation system (twin, triple, double twin system), there are cases of branch pipes being used that have insufficient compressive strength.

In such case, please change the piping to a branch pipe for R410A.

Curing of pipes

When removing and opening the indoor or outdoor unit for a long time, cure the pipes as follows:

•Otherwise rust may be generated when moisture or foreign matter due to condensation enters the pipes.

•The rust cannot be removed by cleaning, and new pipes are necessary.

Placement location	Term	Curing manner
Outdoors	1 month or more	Pinching
	Less than 1 month	Pinching or taping
Indoors	Every time

EN 23 24 EN