62-11785 7–76
07001 ECONOMIZER PRESS SENSOR
• ACTIVATION: Economizer Pressure (ECOP) sensor is out of range.
• UNIT CONTROL: Alarm only. Economizer forced to STANDARD mode when alarm is active.
• RESET CONDITION: Economizer Pressure sensor is in range or alarm may be manually reset using the
display mounted keys or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (See Note 1 in Notes Section.) Operate the unit through the appropriate modes to see if any active
alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1. Check System Pressures
a. Check Unit Data. Refer to Section 3.14. Compare the pressure readings for the ECOP, the CSP
and the CDP. The ECOP should read between the CSP and the CDP, if not it indicates the ECOP
has failed. Refer to Section 8.7.11 for instruction on comparison. If discharge pressure is in
normal range, proceed to next step.
b. Place the Unit in Service Mode. Refer to Section 5.2.5. After the unit has equalized, compare the
pressure readings for the ECOP, the CSP and the CDP. The ECOP the CSP and the CDP should
all read within 5
psi
, if not it indicates the ECOP has failed. Refer to Section 8.7.11 for instruction
on comparison.
2. Check Economizer Pressure Sensor - Inspect sensor & connectors. Verify there is no damage to sen-
sor, and no damage, moisture, or corrosion in connectors.
07006 SUCTION PRESSURE SENSOR
• ACTIVATION: Suction pressure sensor is out of range. If Economizer pressure < or = (Suction pressure -10)
for 10 seconds and suction pressure is > than 40 psig and < than 60 psig with the compressor running.
• UNIT CONTROL: Alarm only. Economizer forced to STANDARD mode when alarm is active.
• RESET CONDITION: Auto reset when Suction Pressure Sensor is in range or, alarm may be manually
reset using the display mounted keys or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (refer to reset condition above). Operate the unit through the appropriate modes to see
if any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1. Check System Pressures
a. Check Unit Data. Refer to Section 3.14. Compare the pressure readings for the ECOP, the CSP
and the CDP. The ECOP should read between the CSP and the CDP. Refer to Section 8.7.11 for
instruction on comparison. If pressures are in normal range, proceed to next step.
b. Place the Unit in Service Mode. Refer to Section 5.2.5. After the unit has equalized, compare the
pressure readings for the ECOP, the CSP and the CDP. The ECOP the CSP and the CDP should
all read within 5
psi
, if not it indicates a failed sensor. Refer to Section 8.7.11 for instruction on
comparison.
2. Check Pressure Sensor - Inspect sensor & connectors. Verify there is no damage to sensor, and no
damage, moisture, or corrosion in connectors.
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