Argo ASMI50HG Technische Daten & Servicehandbuch - Seite 13

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5. TROUBLESHOOTING

■ Precautions before performing inspection or repair

● After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair.

● High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge

(charging voltage DC 280 V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be

careful not to touch any electrified parts before the controller LED (red) turns OFF.

If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow at

least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller.

After inspection or repair is completed, be sure to move the operation switch to the DEMO position, turn the power ON, and

erase the diagnostics contents.

■ Method of self-diagnostics

If the indoor unit operation lamp is flashing every 0.5 seconds, follow the

procedure below to perform detailed trouble diagnostics.

NOTE

1: If the operation lamp flashes every 0.5 seconds immediately when the power is turned ON,

there is an external ROM (OTP data) failure on the indoor circuit board or a board insertion

problem, or the board has not been installed.

2: The failure mode is stored in memory even when the power is not ON. Follow the procedure

below to perform diagnostics.

PROCEDURE

1 Turn the power switch ON.

2 Move the operation selector on the remote control receiver to OFF (self-diagnostics).

3 If there is a sensor failure or a protective function has activated, self-diagnostics lamps 1, 2, and 3 will illuminate in the

following pattern: 5 seconds flashing (illuminated) + 2 seconds OFF. (Buzzer sounds once while lamps are OFF.)

Note: If there is no trouble, then self-diagnostics lamps 1, 2, and 3 do not illuminate, and the buzzer does not sound.

4 Diagnostics is completed when the buzzer sounds 3 beeps.

5 After inspection or repair is completed, be sure to move the operation switch on the indoor unit main body to the DEMO

position, turn the power ON, and erase the diagnostics contents. Then move the operation selector on the remote control

receiver to the OFF position and check that the diagnostics contents have been erased before using the unit.

Operation switch

Ordinarily, be sure

this is always set to

NORMAL.

The DEMO position is

used for inspections

and similar

maintenance.

Operation selector

Ordinarily, be sure this is always set to ON.

The OFF and TEST positions are used for

inspections and similar maintenance.