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CVHE-SB-32A 15

uninstalled it without first removing it from the Custom menu.

Problem corrected on CLD X-13650448-02, Rev. E.

Problem 29: Display is locked up. No communication, Data Not Valid Diagnostic.

Corrective Action:

1 Check the (4) LEDs on the back of the CLD. Left to right.

~ #1 is the Test Light and should be on all the time.

~ #2 is the 5VDC and should be on all the time.

~ #3 is the Transmit and should blink every 2 seconds.

~ #4 is the Receive and should blink continuously.

2 There may be a IPC communication problem with one of the boards. Disconnect the IPC from

all modules except leave the IPC connected from the CLD to Chiller module. Start connecting

the IPC at one at a time until we find which one is the problem.

3 Check the Chiller module 24 VDC, 5 VDC and 24 VAC.

4 Check the CLD (Clear Language Display) grounding. It has to be grounded from the clear

language display to the chassis/back panel.

5 Starter module IPC should not be grounded. Ground is on the Chiller module end. A double

ground will lock up the display.

Problem 30: Display on the CLD is flashing.

Corrective Action:

1 The +5V LED should also be flashing.

2 Verify the 24 VAC delivered to the CLD is within range of 20-28 VAC. Disconnect the IPC to

verify it is not causing this.

Problem 31: External Chilled Water Setpoint Problems.

Corrective Action:

1 Polarity must be (minus) (plus) on J9 4,5 of the Option module.

2 If the 4-20 MA and the 2-10 VDC are out of range, the active chilled water setpoint source

reverts back to front panel and does not work. The 4-20 mA and 2-10 VDC corresponds to 0

to 65°F.

3 Setpoints: SW3-1 should be: OFF for 2-10 VDC and ON for 4-20 mA

4 Chilled Water Reset type is Disabled.

5 Chilled Water Setpoint source is External.

6 Setpoint source override is None.

7 External Chilled Water Setpoint is Installed in machine configuration.

8 Clear any active options module diagnostics.

9 Input type must be selected in the field start-up menu.

10 May need to install an isolation device (DC to DC converter),

11 Set to 2-10 VAC and hook an 8-volt battery to the input to verify the module works.

Trane CVHE Troubleshooting

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