50
Chapter 4
C. Checking For Other Electrical Problems
in Single Phase Motors
This section provides procedures for checking the
components such as the thermal protector, relay and
capacitor in a single phase compressor. Table 4-2
(below) can be used to locate the appropriate proce-
dure for the compressor you are servicing. Examine
the compressor and determine presence and/or the
type of:
1. Thermal protector (internal or external)
2. Relay (current, potential or PTC)
3. Capacitor(s) (start or run)
With that information, use Table 4-2 to determine
the location of the procedure for the compressor you
are servicing.
For more information on:
• Compressor motor types see “Single Phase
Compressor Motor Types” on pages 16-17.
• Thermal protectors see “Hermetic Compressor
Thermal Protectors” on pages 19-26.
• Starting relays see “Compressor Motor Starting
Relays” on pages 27-31.
• Capacitors see “Selecting Capacitors” on pages
32-33.
Table 4-2: Locating Service Procedures by Component Types
Compressor
Motor Type
If Your Compressor Has: Go To:
Thermal Protector
Type Relay Type Capacitor Type
Page
Internal External Current Potential PTC Run Start
Resistance
Start
Induction
Run
(RSIR)
(Split-Phase)
✓ ✓
51
✓
Wired 53
✓
Module 55
Capacitor
Start Induction
Run
(CSIR)
✓✓ ✓
57
✓ ✓ ✓
60
Capacitor
Start
and Run
(CSR)
✓✓✓✓
63
✓ ✓ ✓ ✓
67
Permanent
Split
Capacitor
(PSC)
✓✓
71
✓ ✓
73
✓
Wired
✓
76
✓
Module
✓
78
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