Sanyo CHDX09663 Outdoor unit PCB LED indications in judgment mode, Symptoms of insufficient gas

18. Other Functions

W-2WAY ECO-i SYSTEM Control Functions

(3) Outdoor unit PCB LED indications in judgment mode

Judgment items	LED1	LED2	Recommended response
Judgment mode	Blinking	Blinking	-
Normal	ON	ON	-
Insufficient gas	Blinking	OFF	Charge with refrigerant a little at a time.
				1
Overcharge	OFF	Blinking	Recover refrigerant a little at a time.
Judgment not	Blinking alternately		-
possible

When judgment mode is not engaged, the LED indicates the normal display (OFF), or else indicates alarms or other information.

If the insufficient gas or overcharge judgment is not stable, then recover refrigerant a little at a time when the overcharge display appears. End refrigerant adjustment when the normal or insufficient gas display appears.

(4)Canceling judgment mode

When judgment mode is cancelled, the LED returns to the standard status display (OFF unless an alarm or other event has occurred).

[1]Automatic cancel

Judgment mode is canceled automatically when 4 hours have passed after it was started.

[2]Forced cancel

Short-circuit the CHECK pin while the judgment mode display is active in order to cancel judgment mode.

<Reference> General Guidelines for Insufficient Gas and Overcharge

Judgment in automatic judgment mode can be problematic in some cases. Therefore, the following guidelines are provided for general judgment of the refrigerant amount.

• Symptoms of insufficient gas

Cooling operation

Heating operation

There is an indoor unit where the position of the electronic control valve is much higher (open by 300 pulses or more) than it was at start, and the difference [E3 – E1] at that indoor unit is large (30°F or more).

There is an outdoor unit where the position of the electronic control valve is much higher (open by 300 pulses or more) than it was at start, and the difference [Liquid temp. – Gas temp.] at that outdoor unit is large (30°F or more).

• Symptoms of overcharge

Cooling operation

Heating operation

The high-pressure sensor temperature is 134°F or higher, and the difference [Pressure sensor temp. – Liquid temp.] at that outdoor unit is large (30°F or more).

There is an indoor unit where the position of the electronic control valve is much higher (open by 300 pulses or more) than it was at start, and the difference [Pressure sensor temp. – E3] at that indoor unit is large (50°F or more).

These are only guidelines, therefore the judgment may vary depending on the installation conditions, load char- acteristics, and other elements.

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