P545 Series Electronic Lube Oil Control Product/Technical Bulletin
11
LED Status (Cont.)
Troubleshooting Procedure
Control does not respond to
R310AD switch. (Indicated by the
green LED turning on for
approximately 4 seconds,
followed by the yellow LED
turning on for the duration of the
selected anti-short cycle time
delay. This process repeats
indefinitely.)
Use these steps to resolve the problem:
1. Check that resistor R39 has been cut and discarded.
2. Check the R310AD switch; replace if necessary.
Contactor energizes for 3 or
4 seconds. It remains off for the
duration of the anti-short cycle
time delay, and then repeats
(compressor is unable to start
during the 3 to 4 second period).
Insufficient current to the R310AD switch is the most likely cause of this condition.
Use these steps to resolve the problem:
1. Check compressor for internal overloads.
2. Check the compressor wiring.
3. Check compressor’s contactor.
4. Check compressor for general failure.
Ordering Information
Use the following tables to order the P545 control, the P400 switch, or accessories.
Table 3: P545 Electronic Lube Oil Control Ordering Information
Product Code
Number
Lube Oil Delay
(Seconds)
P400 Switch
Wiring Harness
Fits Compressors
Manufactured by
P545NCB-22C*
120
P400AD-2
WHA-P400-100
Copeland®
P545NCB-25C*
90
P400BD-1
WHA-P400-125
Bitzer
P545NCB-82C*
120
P400AD-1
WHA-P400-100
Carlyle
* Switch and wiring harness included
Table 4: P400 Single-Point Differential Oil Pressure Switch Ordering Information
Product Code
Number
Open Point
(Differential Pressure)
Close Point
(Differential above Open Point)
Threads
Wiring
Harness
P400AD-1C*
7 ± 1.0 psid
Less than or equal to 2.0 psid
3/4-16 UNF
WHA-P400-100
P400AD-2C*
12.75 ± 0.75 psid
Less than or equal to 1.5 psid
P400BD-1C*
10 ±1.5 psid
Less than or equal to 3.0 psid
M20 x 1.5
WHA-P400-125
* Wiring harness included
