Useful Functions; Installation/Servicing Tools - Toshiba RAS-3M26YAV-E Installationshandbuch

• For this outdoor unit, the self-diagnosis is possible by using five LEDs (1 Yellow + 4 Red).
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LEDs (D800 to D804) are provided on P .C. board of the inverter.
LED indication
D800 D801 D802 D803 D804
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Installation/Servicing Tools

In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, to
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
Gauge manifold
Charge hose
Electronic balance
for refrigerant charging
Torque wrench
(nominal diam. 1/2, 5/8)
Flare tool
(clutch type)
Gauge for projection adjustment
Vacuum pump adapter
Gas leakage detector
• 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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Useful Functions

Indoor
alarm code
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None Normal running
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14 IGBT short circuit, Compressor motor rare short
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16 Trouble on position detecting circuit
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17 Trouble on current detecting circuit
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18 Outdoor heat exchanger temp. sensor (TE) fault
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18 Suction temp. sensor (TS) fault
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19 Discharge temp. sensor (TD) fault
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1A Trouble on outdoor fan motor
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1B Outdoor temp. sensor (TO) fault
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1C Trouble on compressor system
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1C Temp. sensor (TGa) fault at A room gas side
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1C Temp. sensor (TGb) fault at B room gas side
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1C Temp. sensor (TGc) fault at C room gas side
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1C Temp. sensor (TGd) fault at D room gas side
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1C Gas leakage, TS sensor out of place, PMV, sensor fault
TE sensor out of place, Indoor heat exchanger sensor
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1C
(TC) out of place, PMV, sensor fault
Miswiring at indoor or outdoor, Gas leakage, TS,
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1C
TC sensor out of place, PMV, sensor fault
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1C Communication trouble between MCU
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1D Compressor lock
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1E Trouble on discharge temp, Gas leakage
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1F Compressor break down
Applicable to R22 model
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manuals search engine
Self-Diagnosis by LED Indication
Contents
Changes in the product and components
As pressure is high, it is impossible to measure by means of conven-
tional 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 size are changed (to 1/2 UNF 20 threads per inch).
When purchasing a charge hose, be sure to confirm the port size.
As pressure is high and gasification speed is fast, it is difficult to read
the indicated value by means of charging cylinder, as air bubbles occur.
The size of opposite sides of flare nuts have been increased. Inciden-
tally, a common wrench is used for nominal diameters 1/4 and 3/8.
By increasing the clamp bar's receiving hole, strength of spring in the
tool has been improved.
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Used when flare is made with using conventional flare tool.
Connected to conventional vacuum pump. It is necessary to use an
adapter to prevent vacuum pump oil from flowing back to the charge
hose. The charge hose connecting part has two ports-one for conven-
tional 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.
Exclusive for HFC refrigerant.
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1. If a trouble occurs, LED goes on
according to the contents of
trouble as shown in the left table.
2. When two or more troubles occur,
LEDs go on cyclically (alternately).
3. Usually, LEDs go off.
LED
D800 D801 D802 D803 D804
Red
Yellow
IGBT : Insulated Gate Bipolar Transistor
PMV : Pulse Modulating Valve
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: LED ON
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: LED OFF
1 : 4 units Multi model only
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* 2 : Heat pump model only
Changes