Daz man
05-12-2012, 09:43 PM
I have a technical issue regarding an Easicool close control cabinet (DF17X-EZR) serial number - 81806788-001. On refrigerant R410a.
Roughly installed 2009/2010.
The digital controller interface on the front of the cabinet is showing an 'Airflow fail fault'
This flags up after roughly about one minute after first initiation.
I have proved the air pressure switch and the internal fan speed controller to find both fully operational. I know this as there is an identical cabinet on site and I have swapped the two mentioned parts.
The two white wires 502 and I can't remember the second, i think it is 515, that enter the air proving switch I have connected together to prove operation. This does solve the issue with the unit now failing to alarm and in sequence bringing in both cooling and humidification, working as it should.
Both positive and negative tubes (blue & yellow) off the air proving switch have been checked for obstruction, water etc to find clear.
The one thing I did notice when the air proving switch was 'shorted out' which seems odd, was that the internal fan (direct drive, no belts) is motoring but seems very slow! Obviously I wouldn't like to put my hand in there as its not that slow, but normally you can hear the draft under the false floor when the fans are running - this seems half the speed.
The indoor fan motor % run settings have also not been altered in the menu of the controller.
Maximum is @ 100%
Minimum is @ 25%
Is it possible to have a fan motor down? If so Is there a way I can prove this by carrying out checks on the motor, windings etc?
The capacitor also checked out ok.
help/advice required!
Roughly installed 2009/2010.
The digital controller interface on the front of the cabinet is showing an 'Airflow fail fault'
This flags up after roughly about one minute after first initiation.
I have proved the air pressure switch and the internal fan speed controller to find both fully operational. I know this as there is an identical cabinet on site and I have swapped the two mentioned parts.
The two white wires 502 and I can't remember the second, i think it is 515, that enter the air proving switch I have connected together to prove operation. This does solve the issue with the unit now failing to alarm and in sequence bringing in both cooling and humidification, working as it should.
Both positive and negative tubes (blue & yellow) off the air proving switch have been checked for obstruction, water etc to find clear.
The one thing I did notice when the air proving switch was 'shorted out' which seems odd, was that the internal fan (direct drive, no belts) is motoring but seems very slow! Obviously I wouldn't like to put my hand in there as its not that slow, but normally you can hear the draft under the false floor when the fans are running - this seems half the speed.
The indoor fan motor % run settings have also not been altered in the menu of the controller.
Maximum is @ 100%
Minimum is @ 25%
Is it possible to have a fan motor down? If so Is there a way I can prove this by carrying out checks on the motor, windings etc?
The capacitor also checked out ok.
help/advice required!