26
Safety And Leakage Check
Electrical safety check
Perform the electrical safety check after
completing installation. Cover the following
areas:
1. Insulated resistance
The insulated resistance must be more t han
2MΩ.
2. Grounding work
After finishing grounding work, measure t he
grounding resistance by visual detection and
using the grounding resistance tester. Make
sure the grounding resistance is less than 4Ω.
3. Electrical leakage check (performing during
test while unit is on)
During a test operation after completed
installation, use a multimeter to perform an
electrical leakage check. Turn off the unit
immediately if leakage happens. Try and
evaluate different solutions until the unit
operates properly.
Gas leak check
1. Soap water method:
Apply a soap-water solution or a liquid
neutral detergent on the indoor unit
connection or outdoor unit connections with
a soft brush to check for leakage of the
connecting points of the piping. If bubbles
emerge, the pipes are experiencing leakage.
2. Leak detector
Use the leak detector to check for leakage.
NOTE: The illustration is for example purposes
only. The actual order of A, B, C and D on the
machine may be slightly different from the
unit you purchased but the general shape will
remain the same.
Indoor unit
check point
Outdoor unit
check point
Fig. 9.4
A, B, C, D are points for one-four type.
Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
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