Carrier 30XW150-400 specifications Reset Method Manual

Possible Causes — If this condition is encountered, check the following items:

•electrical noise

•faulty CPM board

Compressor UL 1998 Current Measure Dual Channel Mismatch

Alarm 132-19 — Circuit A (A1.19)

Alarm 133-19 — Circuit B (B1.19)

Criteria for Trip — The alarm criterion is checked when the compressor is ON. This alarm will be generated if the CPM board detects a software error.

Action to be Taken — The compressor will be stopped.

Reset Method — Manual

Possible Causes — If this condition is encountered, check the following items:

•electrical noise

•faulty CPM board

Service Test — Main power and control circuit power must be on for Service Test.

The Service Test function is used to verify proper operation of various devices within the chiller, such as compressors, min- imum load valve solenoid (if installed), cooler pump(s) and re- mote alarm relay. This is helpful during the start-up procedure to determine if devices are installed correctly. See Fig. 53 for 30XW wiring diagram.

SERVICE TEST WITH NAVIGATOR™ DISPLAY — To use the Service Test mode, the Enable/Off/Remote Contact switch must be in the OFF position. Use the display keys to move to the Service Test mode. The items are described in the Service Test table. There are two sub-modes available. Service Test Enable, T.REQ allows for manual control of the compres- sors and minimum load control. In this mode the compressors will operate only on command. The capacity control, head pressure control, and EXV control algorithms will be active. There must be a load on the chiller to operate for an extended period of time. All circuit safeties will be honored during the test. Quick Test Enable, Q.REQ allows for test of EXVs, pumps, oil solenoids, unloader solenoids and status points (alarm relays, running status and chiller capacity). If there are no keys pressed for 5 minutes, the active test mode will be disabled.

To enter the Manual Control mode with the Navigator™ display, the Enable/Off/Remote Contact switch must be in the OFF position. Move the LED to the Service Test mode. Press ENTER to access TEST. Press ENTER to access T.REQ. Press ENTER and the display will show OFF. Press ENTER and OFF will flash. Enter the password if required. Use either arrow key to change the T.REQ value to ON and press ENTER . Place the Enable/Off/Remote Switch in the enable position. Manual Control mode is now active. Press the arrow keys to move to the appropriate item. To activate an item locate the item, press ENTER and the display will show OFF. Press ENTER and OFF will flash. Use either arrow key to change the value to ON and press ENTER . The item should be active. To turn the item off, locate the item, press ENTER and the display will show ON. The chiller must be enabled by

turning the Enable/Off/Remote Contact switch to Enable. Press ENTER and ON will flash. Use either arrow key to change the value to OFF and press ENTER . The item should be inactive.

To enter the Quick Test mode, the Enable/Off/Remote Contact switch must be in the OFF position. Move the LED to the Service Test mode. Press ENTER to access TEST. Use

the key until the display reads QUIC. Press ENTER to access Q.REQ. Press ENTER and the display will show OFF. Press ENTER and OFF will flash. Enter the password if required. Use either arrow key to change the QUIC value to ON and press ENTER . Quick Test mode is now active. Fol- low the same instructions for the Manual Control mode to acti- vate a component.

Example — Test the oil solenoid circuit A (see Table 53).

Power must be applied to the unit. Enable/Off/Remote Contact switch must be in the OFF position.

Test the cooler pump(s) and alarm relay by changing the item values from OFF to ON. These discrete outputs are then turned off if there is no keypad activity for 10 minutes. Test the compressor and minimum load valve solenoid (if installed) outputs in a similar manner. The minimum load valve sole- noids will be turned off if there is no keypad activity for 10 minutes. Compressors will stay on until the operator turns them off. The Service Test mode will remain enabled for as long as there is one or more compressors running. All safeties are monitored during this test and will turn a compressor, cir- cuit or the machine off if required. Any other mode or sub- mode can be accessed, viewed, or changed during the Manual Control mode only. The STAT item (Run Status→ VIEW) will display “0” as long as the Service mode is enabled. The TEST sub-mode value must be changed back to OFF before the chill- er can be switched to Enable or Remote contact for normal operation.

NOTE: There may be up to a one-minute delay before the selected item is energized.

SERVICE TEST WITH TOUCH PILOT™ DISPLAY — To enter the Manual Control mode with the Touch Pilot dis- play, the unit Operating Type must be Local OFF. Use the START/STOP button on the Touch Pilot display to stop the machine if necessary. To place the unit the Service Test mode, select Main Menu→ STATUS→ Page Down→ SERV_TST and configure Service Test Enable to YES. Enter the pass- word if required. Configure the desired compressor output to ON. Then press the START/STOP button on the Touch Pilot dispaly and select Local on. Return to the SERV_TST screen to start and stop compressors or manually operate the compres- sor slide valve.

To enter the Quick Test mode, the unit Operating Type must be Local OFF. Use the START/STOP button on the Touch Pilot display to stop the machine if necessary. To place the unit in Quick Test mode select Main Menu→ STATUS→ Page Down→ QCK_TST1 and configure Quick Test Enable to Yes. Enter the password if required. Configure the desired output to ON, percent output or stage to confirm operation of the component.

83