Delays Due To Alarm Signals; Serious Alarms; Active Alarms - Trane mP30 Installation Operation & Maintenance

Control for precision air conditioners

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UG30 CONTROL

Some alarm signals can be delayed with respect to the activation of a component to allow stable operating

conditions to be reached – for example:

Alarm A:FL (airflow absent or presence of fire-smoke) is not read during the first 30 seconds after fan start; this

value is linked to the FACTORY P1 parameter.

Alarms LO:C1 and LO:C2 (1/2 circuit low pressure) are not read during the first 180 seconds after start-up of

the relevant compressor. This value is linked to the FACTORY parameter P3.

ALAR

LARM

Delay of low/high temperature/humidity alarm at start-up.

This establishes the delay in recognising low/high temperature and humidity

alarms at UNIT start-up. N.B.: The low humidity alarm is delayed at humidifier

start-up. This is to avoid a low humidity alarm when a possible humidifier

alarm is reset.

General alarm delay. This establishes the activation delay of the ID5 general

alarm.

This establishes the delay in recognising the flow alarm from start of fan.

This establishes the delay in recognising the flow alarm while the fan is

operating.

This establishes the delay in recognising the low pressure alarm at

compressor start-up to allow reaching a stable situation.

Two different types of alarm warnings are available: "serious " and "non-serious" alarms (see section

"DESCRIPTION OF ALARM CODES ").

In a configuration with more than one unit connected, serious alarms trigger the activation of the DO7 relay and

therefore the activation of the unit in stand-by.

In a configuration with no unit rotation, the FACTORY parameters HA and HF can be changed, in such a way as to

have two different alarm signals:

- "serious alarms" through the general alarm relay DO6;

- "non-serious alarms" through the dehumidification relay DO7 (CW/S and DX/S only).

GLb

ENERAL

Configuration of digital output DO7:

2 = alarm relay for not critical alarms (follows the logic

set through the parameter HF)

3 = output for rotation control

Alarm relay logic:

0 = de-energise in alarm for all the alarms

2 = de-energise in alarm only for the serious alarms

When an alarm occurs, the control performs the following actions:

•

displays the

•

de-energize the DO6 relay (general alarm); the relays functioning logic, normally energised

or de-energised, and the alarm category that activates this relay is set by the HF parameter

(default equals 0);

•

(in JUPITER CW/S and DX/S units, if HA is set to 2) relay D07 de-energised (non-serious alarm); relay

logic, normally energised or de-energised, is defined by parameter HF (default setting is 0);

•

lights up the red light of key

•

activates the buzzer (if the USER P4 parameter is set at a value other than zero).

mP30-UG30 - Rev. 1.5 - Date: 18-03-2004