MOVIN
COOL
24HFU / 24HFU-1 SERVICE
PAGE 38
REPAIR - INSPECTION AND REPAIR OF ELECTRICAL SYSTEM • 24HFU
4-10. Inspection of High Pressure Switch
Check for continuity across two terminals of the
high pressure switch. With pressure equalized
when the unit is stopped, there is continuity
across two terminals. If continuity is interrupted
across the terminals, replace the high pressure
switch.
Specifications:
Cut off pressure - 29.5kg/cm
2
G
(420 PSIG)
Reset pressure - 20.5kg/cm
2
G
(291 PSIG)
■
Inspection of High Pressure Switch
4-11. Inspection of Compressor Relay
Check for continuity across the terminals when
the test button is depressed and when test
button is released.
■
Inspection of Compressor Relay
4-8.
Inspection of Wiring Connection
Refer to the Wiring Diagrams 3-2-1. (pg. 35 and
36) and check for connection of each wire.
4-9.
Inspection of Anti-freezing Thermostat
Check for continuity across two terminals of the
thermostat. At normal temperature (17˚C/63˚F
or higher), there is continuity across two termi-
nals. If continuity is interrupted across the
terminals, replace the thermostat.
■
Inspection of Thermostat
Depressed:
Continuity exists between each pair of
opposing terminals
Released:
No continuity exists between each pair of
opposing terminals
Measure the resistance across terminals A
and B. Standard resistance: 650~800
Ω
When the resistance is out of this range, replace
the compressor relay.
