Operating Instructions
63
•
If running a Pretrip Test on a trailer loaded with sensitive
cargo, monitor the load temperature during the test as
normal temperature control is suspended during pre-trip
operation.
•
Always perform Pretrip Tests with the trailer cargo doors
closed to prevent false test failures.
Pretrip Test Sequence
Pretrip tests proceed in the order shown below. A Full Pretrip
Test is started with the engine or motor not running and
includes all tests. A Running Pretrip Test is started with the
engine or motor running and does not include the Amp Checks
or Engine Start Check.
•
Amp Checks - Each electrical control component is
energized and the current drawn is confirmed as within
specification.
•
Engine Start - The Engine will start automatically.
•
Defrost - If the coil temperature is below 45°F (7°C), a
defrost cycle is initiated.
•
RPM Check - The engine RPM in high and low speed is
checked during the Cool Check.
•
Zone 1 Cool Check - The ability of the unit to cool in low
speed is checked.
•
Zone 1 Heat Check - The ability of the unit to heat in low
speed is checked.
•
Zone 1 Return to Cool Check - The ability of the unit to
return to cool mode is checked
•
Zone 2 Cool Check - The ability of the unit to cool in low
speed is checked.
•
Zone 2 Heat Check - The ability of the unit to heat in low
speed is checked.
•
Zone 2 Return to Cool Check - The ability of the unit to
return to cool mode is checked
•
Zone 3 Cool Check - The ability of the unit to cool in low
speed is checked.
•
Zone 3 Heat Check - The ability of the unit to heat in low
speed is checked.
•
Zone 3 Return to Cool Check - The ability of the unit to
return to cool mode is checked
Summary of Contents for Precedent C-600M
Page 2: ......
Page 58: ...Operating Instructions 56 Figure 44 Initiating a Manual Defrost Cycle Defrost Key...
Page 71: ...Operating Instructions 69 Figure 61 Performing a Pretrip Test 2 From Figure 60...
Page 85: ...Operating Instructions 83 Figure 83 Displaying and Clearing Alarm Codes 1 See Figure 84...
Page 86: ...Operating Instructions 84 Figure 84 Displaying and Clearing Alarm Codes 2 From Figure 83...
Page 165: ......
