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This section contains information specific to the dual temperature system. For additional troubleshoot-
ing information, refer to Section 5 of the Operation and Service Manual for 69NT40-541-300 to 399
series units.
CONDITION
5.1
REMOTE EVAPORATOR NOT RUNNING
Remote evaporator does not run
5.2
REMOTE EVAPORATOR RUNS BUT HAS INSUFFICIENT COOLING
Remote evaporator provides air circulation
only
5.3
REMOTE SUPPLY SENSOR MALFUNCTION
Remote Secondary Supply Sensor (SSP-
Ly) is controlling the Remote evaporator
Remote Primary Return Sensor (rEtUR)
minus 3.5 degrees F is controlling the re-
mote evaporator
5.4
HOST UNIT TRIGGERS A SHUTDOWN ALARM
Shutdown alarm is triggered in the Host
unit
SECTION 5
TROUBLESHOOTING
NOTE
POSSIBLE CAUSE
Host unit has not reached set point.
All remote temperature sensors have failed.
Code Select Cd52 is disabled.
Remote Liquid Line Solenoid Valve (RLSV) in-
operative.
Remote Primary Supply Sensor (PSPLy) has
failed.
Both the Remote Secondary Supply Sensor
(SSPLy) and the Remote Primary Supply
Sensor (PSPLy) have failed.
If the cooling components needed to operate
the remote evaporator are available, the unit
will still operate.
5–1
REMEDY
Wait for host unit to
reach set point
Check/Replace
Enable
Check/Replace
Check/Replace
Check/Replace
None
T-319
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