Section 5 – SR-2 Diagnostics
42 UNIT FORCED TO LOW SPEED
Page 1 of 1
Alarm Type
Log Alarm
Associated Alarm
Codes
Alarm Code 10 High Discharge Pressure or Temperature
Alarm Code 18 High Engine Coolant Temperature
Alarm Code 41 Check Engine Coolant Temperature
Alarm Code 43 Unit Forced to Low Speed Modulation.
How Alarm is Set
The unit has been forced to low speed operation, as a result of high engine coolant temperature or high discharge
pressure. Alarm Code 10, Alarm Code 18 or Alarm Code 41 will also be set.
ETV units: If the engine coolant temperature is above acceptable limits the ETV will be closed to reduce the engine
load.
How Alarm is Cleared
Alarm will self-clear if unit returns to normal operation.
Diagnostic Procedure
Troubleshoot as shown for the associated alarm code.
43 UNIT FORCED TO LOW SPEED MODULATION
Page 1 of 1
Alarm Type
Log Alarm
Associated Alarm
Codes
Alarm Code 10 High Discharge Pressure or Temperature
Alarm Code 18 High Engine Coolant Temperature
Alarm Code 41 Check Engine Coolant Temperature
Alarm Code 42 Unit Forced to Low Speed
How Alarm is Set
Unit is running in low speed, but the engine coolant temperature is above acceptable limits. The ETV will be closed
to reduce the engine load.
How Alarm is Cleared
Alarm will self-clear if unit returns to normal operation.
Considerations
Applies to ETV units only.
Diagnostic Procedure
Troubleshoot as shown for the associated alarm code.
5-49
02 February 2005
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