MULTI- ZONE / FROZEN FOOD VENDOR • 3576 • 4222618A | 33
TROUBLESHOOTING CIRCUITS WITH MULTI-METER
Caution: Power must be disconnected and fan circuit open.
1. To check the power source, use the
voltage section of the Multi-Meter.
Acceptable range is 103-127VAC for
115V (60Hz), or 195-255VAC 230V
(50Hz).
Danfoss 5/8 HP – Remove relay from
compressor. See Figure 9b and
Figure 9d on pages 30 and 30.
• Use ohmmeter to check for
continuity between switch terminals
1 and 2. Replace if continuity
exists.
• Use ohmmeter to check for
continuity between coil terminals 5
and 2.
2. Check temperature sensor harness
to control board for continuity using
ohmmeter of Multi-Meter. Replace if
there is no continuity.
3. Check compressor windings using
ohmmeter. Refer to Table 1,
Figure 9b, and Figure 9d on page 30.
4. Check motor protector (overload).
Use the ohmmeter section of the
Multi-Meter.
Danfoss 5/8 HP – Remove the
overload. Check between the overload
terminals for continuity. If no continuity
is measured (infinity), overload may
be tripped. Wait 10 minutes and try
again. If still no continuity, overload is
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