Locations Of Controls; Safety Precautions; Insulation Resistance Test - Quasar HQ-2051SH Service Manual

1.3 LOCATIONS OF CONTROLS

OFF
FAN COOL
HIGH HIGH
LOW
THERMOSTAT
6
5
4 7
3
2
1
10
CAUTION : After switching the air conditioner from Cool to Off or Fan, wait at least 3 minutes before switching it
back to Cool.

1.4 SAFETY PRECAUTIONS

1. When servicing, set the ROTARY SWITCH to
Off and unplug the power cord.
2. Observe the original lead dress.
If a short circuit is found, replace all parts which
have been overheated or damaged by the short cir-
cuit.
3. After servicing, make an insulation resistance test
to prevent the customer's exposure to shock
hazards.
LOW
TEMP CONTROL
5
4
3
8
9 2
1
Off
OFF High Fan
Low Fan
High Cool —
Low Cool
This automatically controls the temperature of
the indoor air.
6
Turn the knob so that the arrow points to the
7
larger marks for greater cooling. Point the
8
arrow to the smaller marks for more moderate
cooling.
9
(i.e. the higher the number, the greater the
cooling)
10

1.5 INSULATION RESISTANCE TEST

1. Unplug the power cord and connect a jumper
between 2 pins (black and white).
2. The grounding conductor (green or green and yel-
low) is to be open.
3. Measure the resistance value with an ohm meter
between the jumpered lead and each exposed
metallic part on the equipment at all positions
[except Off] of the ROTARY SWITCH.
4. The value should be over 1 MΩ.
—4—
— Turns air conditioner off.
— High speed fan operation
without cooling.
— Low speed fan operation
without cooling.
Cooling with high speed fan
operation.
— Cooling with low speed fan
operation.