Carrier AQUASNAP 30RAP010-150 Controls, Start-Up, Operation, Service, And Troubleshooting page 82

This alert will reset automatically if one of two conditions is
met:
1. If the Leaving Water Temperature, LWT (Run Sta-

tus VIEW) is less than the Control Point, CTPT (Run

Status VIEW) plus the High Leaving Chilled Water
Alert Limit, LCWT (Configuration
(2.8° C).
LWT < CTPT + LCWT – 5° F (2.8° C)
2. If the Leaving Water Temperature, LWT (Run Sta-

tus VIEW) is less than the Control Point, CTPT (Run

Status VIEW).
LWT < CTPT

OPT2) minus 5° F
82
If this condition is encountered, check to be sure building
load does not exceed unit capacity.
T501, T502, T503 (Current Sensor Board Failure — A xx
Circuit A)
T505, T506, T507 (Current Sensor Board Failure — B xx
Circuit B) — Alert codes T501-T503 are for compressors A1-
A3, respectively, and T505-T507 are for compressors B1-B3,
respectively. These alerts occur when the output of the CSB is a
constant high value. These alerts reset automatically. If the
problem cannot be resolved, the CSB must be replaced.