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For each auto-component test, the following information is
grouped in one screen: test status, component status, and values
of response parameters.
Auto-Component Test Control Descrip-
tions —
The compressor auto-component test requires the
following conditions:
1. Unit is not shut down due to failure (A152).
2. No compressors are on or requested on.
3. All compressors are available for staging.
The testing screen will display the following:
The compressor auto-component test functions by staging
all compressors ON and verifying a corresponding change in
the compressor CSB (compressor status board) and that circuit
suction pressure (SP.A/SP.B) decreases at least AC_SP_DR.
AC_SP_DR (Auto-Component Suction Pressure Drop) is the
expected suction pressure drop when starting a compressor. It
is used during the compressor auto component test. When a
compressor is staged, the control verifies the suction pressure
drops by AC_SP_DR. The default value is 3, with a range of 0
to 10 psig.
Setting CP.TS=ON will perform the following automati-
cally:
1. Turn supply fan and required condenser fans ON.
2. After 25 seconds, stage up one compressor.
3. Verify CSB changes state properly.
4. Verify circuit SP decreases by AC_SP_DR within 30 sec-
onds.
5. Wait 30 seconds.
6. Repeat Steps 1-5 for next compressor until all compres-
sors are staged ON.
7. Stage all compressors down and verify CSB changes
state properly.
8. End test.
If a compressor is commanded ON and the corresponding
CSB indicates OFF, a "Compressor Failure" alert will be
logged:
If a compressor is commanded ON and the corresponding
CSB indicates ON while a decrease in suction pressure is not
detected, the "Suction Pressure Alert" will be logged:
If a compressor is commanded OFF and the corresponding
CSB indicates ON, a "Compressor Stuck" alarm will be
logged:
Selecting "RSLT" from the compressor auto-test screen will
display the compressor auto-test result screen. The following
display is an example where the A2 compressor failed the test:
Digital Scroll Compressor (A1) Auto-Compo-
nent Test — The digital scroll auto-component test re-
quires the following conditions:
1. Unit is not shut down due to failure (A152).
2. DG.A1=YES (digital scroll compressor installed on A1
and enabled).
3. OAT<DSMAXOAT (digital scroll maximum OAT).
4. No compressors are on or requested on.
5. Compressor A1 is available to start.
The testing screen will display the following:
The digital scroll auto-component test functions by running
the scroll compressor (A1.CP) at 50% and 100% while verify-
ing a change in average circuit suction pressure (SP.AV) of
AC_DS_SP.
The digital scroll auto-component suction pressure drop
(AC_DS_SP) will default to 2.5 psig with a range of 0 to
10 psig.
Setting DS.TS=ON will perform the following:
1. Turn supply fan and condenser fans ON.
2. Wait for 25 seconds.
3. Set digital scroll capacity to 50%.
4. Verify circuit SP.AV decreases by AC_DS_SP within 30
seconds.
5. Wait 2 minutes.
6. Set digital scroll capacity to 100%.
7. Verify circuit SP.AV decreases AC_DS_SP within 30 sec-
onds.
8. End test.
CP.TS ON Run Compressor Auto-Test
CT.ST Staging 1/8 Test Status and Timer
SP.A 188.5 psig Cir A Suction Pressure
SP.B 207.3 psig Cir B Suction Pressure
RSLT Comps Auto-Test Results
T051 Circuit A, Compressor 1 Failure
T052 Circuit A, Compressor 2 Failure
T053 Circuit A, Compressor 3 Failure
T059 Circuit A, Compressor 4 Failure
T054 Circuit B, Compressor 1 Failure
T055 Circuit B, Compressor 2 Failure
T056 Circuit B, Compressor 3 Failure
T060 Circuit B, Compressor 4 Failure
T062 Circuit A, Suction Pressure Alert
T063 Circuit B, Suction Pressure Alert
A051 Circuit A, Compressor 1 Stuck On Failure
A052 Circuit A, Compressor 2 Stuck On Failure
A053 Circuit A, Compressor 3 Stuck On Failure
A059 Circuit A, Compressor 4 Stuck On Failure
A054 Circuit B, Compressor 1 Stuck On Failure
A055 Circuit B, Compressor 2 Stuck On Failure
A056 Circuit B, Compressor 3 Stuck On Failure
A061 Circuit B, Compressor 4 Stuck On Failure
A1 Passed Comp A1 Auto-Test Result
A2 Failed Comp A2 Auto-Test Result
A3 Passed Comp A3 Auto-Test Result
A4 Passed Comp A4 Auto-Test Result
B1 Passed Comp B1 Auto-Test Result
B2 Passed Comp B2 Auto-Test Result
B3 Passed Comp B3 Auto-Test Result
B4 Passed Comp B4 Auto-Test Result
DS.TR ON Run Dig Scroll Auto-Test
DS.DT Running 1/1 Test Status and Timer
A1.CP 50% Compressor A1 Capacity
SP.A 188.5 psig Cir A Suction Pressure
SP.AV 185.5 psig Avg Suction Pressure A
DS.ST Running Dig Scroll AutoTest Stat
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