Table 3-7 Controller Pre-Trip Test Codes (Sheet 1 of 4)

 

 

 

Code

TITLE

DESCRIPTION

No.

 

 

 

 

NOTE

 

“Auto” or “Auto1” menu includes the: P0, P1, P2, P3, P4, P5, P6 and rSLts. “Auto2” menu

 

includes P0, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 and rSLts.

 

 

All lights and display segments will be energized for five seconds at the start of

P0-0

Pre-Trip Initiated

the pre-trip. Since the unit cannot recognize lights and display failures, there are

 

 

no test codes or results associated with this phase of pre-trip.

 

 

Setup: Heater must start in the OFF condition, and then be turned on. A current

P1-0

Heaters Turned On

draw test is done after 15 seconds.

 

 

Pass/Fail Criteria: Passes if current draw change is within the range specified.

 

 

Setup: Heater must start in the ON condition, and then be turned off. A current

P1-1

Heaters Turned Off

draw test is done after 10 seconds.

 

 

Pass/Fail Criteria: Passes if current draw change is within the range specified.

 

 

Requirements: Water pressure switch or condenser fan switch input must be

P2-0

Condenser Fan On

closed.

Setup: Condenser fan is turned ON, a current draw test is done after 15 seconds.

 

 

 

 

Pass/Fail Criteria: Passes if current draw change is within the range specified.

 

 

Setup: Condenser fan is turned OFF, a current draw test is done after 10 sec-

P2-1

Condenser Fan Off

onds.

 

 

Pass/Fail Criteria: Passes if current draw change is within the range specified.

P3

Low Speed Evapora-

Requirements: The unit must be equipped with a low speed evaporator fan, as

tor Fans

determined by the Evaporator Fan speed select configuration variable.

 

 

 

Setup: The high speed evaporator fans will be turned on for 10 seconds, then off

P3-0

Low Speed Evapora-

for two seconds, then the low speed evaporator fans are turned on. A current

draw test is done after 60 seconds.

 

tor Fan Motors On

Pass/Fail Criteria: Passes if change in current draw is within the range speci-

 

 

fied. Fails if AL11 or AL12 activates during test.

 

 

Setup: The low speed Evaporator Fan is turned off, a current draw test is done

P3-1

Low Speed Evapora-

after 10 seconds.

tor Fan Motors Off

Pass/Fail Criteria: Passes if change in current draw is within the range speci-

 

 

 

fied. Fails if AL11 or AL12 activates during test.

 

 

 

 

 

Setup: The high speed Evaporator Fan is turned on, a current draw test is done

P4-0

High Speed Evapo-

after 60 seconds.

rator Fan Motors On

Pass/Fail Criteria: Passes if change in current draw is within the range speci-

 

 

 

fied. Fails if AL11 or AL12 activates during test.

 

 

 

 

 

Setup: The high speed Evaporator Fan is turned off, a current draw test is done

P4-1

High Speed Evapo-

after 10 seconds.

rator Fan Motors Off

Pass/Fail Criteria: Passes if change in current draw is within the range speci-

 

 

 

fied. Fails if AL11 or AL12 activates during test.

 

 

 

 

 

Setup: The High Speed Evaporator Fan is turned on and run for eight minutes,

 

 

with all other outputs de-energized.

 

 

Pass/Fail Criteria: A temperature comparison is made between the return and

P5-0

Supply/Return Probe

supply probes.

Test

NOTE

 

 

 

If this test fails, “P5-0” and “FAIL” will be displayed. If both Probe tests

 

 

(this test and the PRIMARY/ SECONDARY) pass, the display will read

 

 

“P5” “PASS.”

3-21

T-309

Page 46
Image 46
Carrier 69NT20-531-300 manual Draw test is done after 15 seconds, P1-1, Draw test is done after 10 seconds, Onds, P5 Pass

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