Toshiba RAM-SM800AT-E, RAM-SM800KRT-E, RAM-SM560AT-E, RAM-SM800BT-E Final Installation Checks, 105

10 FINAL INSTALLATION CHECKS

Useful Functions (SM800AT-E only)

Self-Diagnosis by LED Indication

In addition to the code checking by remote controller of the indoor unit, troubles of the outdoor unit can be diagnosed by LED indications on the cycle control P.C. board of the outdoor unit. Utilize them for various checks.

For the check by remote controller of the indoor unit, refer to the Installation Manual of the indoor unit. Before a check, confirm each bit of the DIP switch is set to OFF position.

LED indication and code checking

DIP switch				Cycle control P.C. board
				LED indication				Cause
	SW800
				D800	D801	D802	D803
				¡	l	l	l	Heat exchanger sensor (TE) error
				l	l	¡	l	Suction sensor (TS) error
				¡	¡	l	l	Discharge sensor (TD) error
				l	¡	l	¡	High-pressure protection error
				l	¡	l	l	Outdoor temperature sensor (TO) error
				¡	¡	¡	l	DC outside fan error
				¡	l	l	¡	Communication error between IPDU
				l	¡	¡	l	Discharge temp. error
ON				¡	¡	l	¡	EEPROM error
				l	l	¡	¡	Communication error between IPDU
1	2	3	4	¥	l	l	l	G-Tr short-circuit protection
				l	¥	l	l	Detect circuit error
				¥	¥	l	l	Current sensor error
				l	l	¥	l	Comp. lock error
				¥	l	¥	l	Comp. break down
				l	l	l	¥	Phase missing detection, Detection of coming-off of CT current sensor
				l	¡	l	¡	Serial communication error by thermo. operation of Comp. case

LED

indication

D800¡ : Red

D801¡ : Yellow

D802¡ : Yellow

D803¡ : Yellow

¥: Rapid flash l : Go off

¡ : Go on

Installation/Servicing Tools

Changes in the product and components

In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)

•In order to increase the pressure resisting strength of the refrigerant piping flare processing diameter and size of opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

New tools for R410A

New tools for R410A	Applicable to R22 model		Changes
	⋅		As pressure is high, it is impossible to measure by means of conventional
Gauge manifold			gauge. In order to prevent any other refrigerant from being charged, each
			port diameter is changed.
	⋅		In order to increase pressure resisting strength, hose materials and port
Charge hose			size are changed (to 1/2 UNF 20 threads per inch).
			When purchasing a charge hose, be sure to check the port size.
Electronic balance	¡		As pressure is high and gasification speed is fast, it is difficult to read the
for refrigerant charging			indicated value by means of charging cylinder, as air bubbles occur.
Torque wrench	⋅		The size of opposite sides of flare nuts have been increased. Incidentally,
(nominal diam. 1/2, 5/8)			a common wrench is used for nominal diameters 1/4 and 3/8.
Flare tool	¡		By increasing the clamp bar’s receiving hole, strength of spring in the tool
(clutch type)			has been improved.
Gauge for projection adjustment	—	—	Used when flare is made with using conventional flare tool.
			Connected to the conventional vacuum pump. It is necessary to use an
			adapter to prevent vacuum pump oil from flowing back to the charge hose.
Vacuum pump adapter	¡		The charge hose connecting part has two ports-one for conventional
			refrigerant (7/16 UNF 20 threads per inch) and one for R410A.
			If the vacuum pump oil (mineral) mixes with R410A a sludge may occur
			and damage the equipment.
Gas leakage detector	⋅		Exclusive for HFC refrigerant.

•Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the U,S.’s ARI specified rose color (ARI color code: PMS 507).

•Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to the charge hose’s port size.

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