GSZH5 Service Manual
79
SERVICING
Capacitor, Run
A run capacitor is wired across the auxiliary and main
windings of a single phase permanent split capacitor
motor. The capacitors primary function is to reduce the line
current while greatly improving the torque characteristics
of a motor. This is accomplished by using the 90° phase
relationship between the capacitor current and voltage
in conjunction with the motor windings, so that the motor
will give two phase operation when connected to a single
phase circuit. The capacitor also reduces the line current to
the motor by improving the power factor.
The line side of this capacitor is marked with “COM” and is
wired to the line side of the circuit.
WARNING
1. Set the meter on Ohm range (Set it at lease 1000
Ohm=1k).
WARNING
2. Connect the Meter leads to the Capacitor terminals.
3. Digital meter will show a reading momentarily (Figure
1). Note the reading.
4. Reading will immediately return to the OL = (Open
Line) (Figure 2). Every attempt of Step 2 will show the
same result as was in step 4 and Step 5. This indicates
that the capacitor is good.
5. If there is no Change, then capacitor is dead and must
be replaced.
1. Good Condition - indicator swings to zero and slowly
resistor).
2. Shorted - indicator swings to zero and stops there -
replace.
3. Open - no reading - replace (Start capacitor would read
resistor resistance).
WARNING
have a Capacitance meter on your multi-meter.
1. Remove the capacitor from the circuit.
2. Now Select “Capacitance” on your multi-meter.
3. Now connect the capacitor terminals to the multi-meter
leads.
4. If the reading is near to the actual value of the capacitor
(i.e. the printed value on the capacitor). The capacitor
is good (Note that the reading may be less than the
actual printed value of the capacitor).
5.
all, then capacitor is dead and must be replaced.
Capacitor, Start
Scroll Compressor Models
In most cases hard start components are not required on
Scroll compressor equipped units due to a non-replaceable
check valve located in the discharge line of the compressor.
However, in installations that encounter low lock rotor
voltage, a hard start kit can improve starting characteristics
and reduce light dimming within the home. Only hard
start kits approved by Amana® brand or Copeland should
be used. “Kick Start” and/or “Super Boost” kits are not
approved start assist devices.
to the compressor after shut down allowing equalization