II - 8
(4) Sparkplug Replacement
Safety Precautions
Stopping only the indoor unit is extremely dangerous because the engine
may suddenly start if the customer operates the remote controller on the
indoor unit side. Before carrying out work on the inside of the outdoor unit,
make sure you turn off the power supply circuit breaker of the outdoor unit.
(However, if a system controller or other centralized control device is being
used, an abnormal communications error may be generated.) Alternatively,
perform the STOP operation for the outdoor unit.
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The sparkplug replacement must be performed every 10,000 hours or 5 years,
whichever comes first.
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Make sure to use genuine parts for the replacement sparkplugs (Figure 1).
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The following tools, gauges, and parts are required for doing this work. Pre
-
pare them before starting.
■ Preparation for work
Name
Specification
Q’ty
Remarks
To
ol
s
Sparkplug wrench
Torque wrench
9.8 - 29.4N•m
Screwdriver
No-3 Phillips (+), No-2 Phillips (+)
each
Wire brush
Spark plug
623-194-7664
(638-018-9588 can also be used)
4
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Engine Stop
Stop the engine. (Refer to the safety precautions and Section 1. (4) “
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Engine Stop.”)
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Remove the panel.
Remove the front panel of the unit.
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Removing the wire harness plugs
Remove the wire harness plugs from the sparkplug coils (Figure 5).
Figure 1
