CODE

TITLE

 

DESCRIPTION

#

 

 

 

 

 

 

 

High Speed

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

 

after 10 seconds.

 

 

 

P4-1

Evaporator Fan

 

 

 

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

 

Motors Off

 

specified. 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.

 

P5-0

Supply/Return Probe

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

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.”

 

 

 

 

 

Requirements: For units equipped with secondary supply probe only.

 

 

Pass/Fail Criteria: The temperature difference between primary and secondary

 

 

probe (supply) is compared.

 

P5-1

Supply Probe Test

 

NOTE

 

 

 

If this test fails, “P5-1” and FAIL will be displayed. If both Probe tests (this

 

 

and the SUPPLY/ RETURN TEST) pass, because of the multiple tests, the

 

 

display will read ’P 5’ ’PASS’.

 

 

 

 

 

 

 

 

Requirements: For units equipped with secondary return probe only.

 

 

Pass/Fail Criteria: The temperature difference between primary and secondary

 

 

probe (return) is compared.

 

 

 

 

NOTES

 

P5-2

Return Probe Test

S If this test fails, “P5-2” and “FAIL” will be displayed. If both Probe

 

 

tests (this test and the SUPPLY/ RETURN) pass, because of the

 

 

multiple tests, the display will read “P 5,” “PASS.”

 

 

S The results of Pre-Trip tests 5-0, 5-1 and 5-2 will be used to activate or

 

 

clear control probe alarms.

 

 

 

Setup: The compressor is started. If it is the first compressor start, the

 

 

compressor reliability enhancement logic (CREL) is executed, running a current

 

Single Speed

draw test with the additional outputs (if installed) in the following states:

 

Compressor Test

 

 

 

 

P6-0

Component

Normal Logic

 

CREL (3 minutes)

(For single speed

 

 

(10 seconds)

 

 

units)

 

 

 

 

SSV

Closed

 

Open

 

 

 

 

 

SMV

70%

 

100% (for 3 minutes) then 70%

 

 

 

 

 

 

 

Setup: Prior to this testing the ambient temperature is checked. If the ambient

 

 

temperature is less than 60_F, the high speed compressor test will run first. If the

 

Dual Speed

ambient temperature is greater than 60_F, or if the ambient temperature is

 

invalid, the low speed compressor test will run first. Once the first compressor

 

Compressor Tests

P-6

test has been completed, the switch over to the other compressor test will follow.

(For dual speed

 

Upon entry to this test section, the high speed evaporator fan should already be

 

units)

 

running, if not, it is started. After the evaporator fan has run for five seconds, the

 

 

 

 

high speed condenser fan is started. After the condenser fan has run for five

 

 

seconds, the compressor test is run.

 

T-268-07

3-20

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Carrier 69NT40-511-199, 69NT40-521 manual Component Normal Logic Crel 3 minutes, Seconds