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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

D800

: Red

D801

: Yellow

D802

: Yellow

D803

: Yellow

: Rapid flash

: Go off

: Go on

Useful Functions (SP562AT-E, SP802AT-E)

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

• 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.

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

Applicable to R22 model

×××××

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×××××

Changes

As pressure is high, it is impossible to measure by means of conventional
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 check 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 sizes 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.

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.
The charge hose connecting part has two ports - one for conventional
refrigerant (7/16 UNF 20 threads per inch) and the other for R410A. If the
vacuum pump oil (mineral) mixes with R410A, sludge may occur and
damage the equipment.

Exclusive for HFC refrigerant.

LED indication

Cause

Heat exchanger sensor (TE) error
Suction sensor (TS) error
Discharge sensor (TD) error
High-pressure protection error
Outdoor temperature sensor (TO) error
DC outside fan error
Communication error between IPDU (Abnormal stop)
High-pressure release operation
Discharge temp. error
EEPROM error
Communication error between IPDU (No abnormal stop)
G-Tr short-circuit protection
Detect circuit error
Current sensor error
Comp. lock error
Comp. break down

Cycle control P.C. board

LED indication

D800 D801 D802 D803