Menu Item Description
6 RTHC-SVD01B-EN
The recommended motor heating time constants are a function of
compressor size.
The initial value of RI Timer is based on the background timer by the
equation RI = BT - 8.0 minutes and is re-calculated immediately on
power up, and just after each start (once the BT is incremented by the
Motor heating Time constant). Once the initial value is set, the RI Timer
continues to timeout during all modes of operation.
The initial RI Timer never is allowed to be less than 30 seconds nor
any higher than the Maximum value as set in a Field Startup Menu
(adjustable from 5 to 20 minutes). The initial value of the RI Timer shall
Table 2-1: Restart Inhibit Parameters
Parameter Value
Adjustment range of Motor Heating
constant
0-100 minutes
Default of Motor Heating constant 5 minutes.
General RI Timer Equation RI = BT - 8 Minutes
Minimum RI Timer 30 Seconds
Maximum RI Timer (Adjustable
setting)
5 to 20 Minutes
Default Factory Setting of Maximum
RI Timer
5 Minutes
IFW Diagnostic Threshold RI Timer = 15 Minutes
Table 2-2: Motor Heating Constant
Compressor
Size
Motor Heating Constant
(minutes)
B1/B2 3
C1/C2 4
D1/D2/D3 5
E3 5
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