GSZH5 Service Manual

73
SERVICING
1. Apply power to unit and set thermostat to cool and set
for a call for cool.
2. Low pressure switch should open at 21 PSIG, and auto
reset (close) at approximately 50 PSIG.
3. If low pressure switch does not operate in these
parameters replace switch.

1. Connect refrigerant gages to unit.
2. Disconnect power to outdoor unit.
3. Remove control panel cover.
4. Disconnect black wire from condenser fan motor
(single stage units) or remove plug from control board
on 2 stage units. NOTE: Tape or isolate black wire to
prevent possible short.
5. Apply power to unit and set thermostat to cool and set
for all for cool.
6. Low pressure switch should open at 21 PSIG and auto
reset (close) at approximately 50 PSIG.
7. If low pressure switch does not operate in these
parameters replace switch.
Copeland Comfort Alert™ Diagnostics - 3-Wire module

WARNING





Comfort Alert™ is self-contained with no required external
sensors and is designed to install directly into the electrical
box of any residential condensing unit that has a Copeland
Scroll™ compressor inside.
Once attached, Comfort Alert provides around-the-clock
monitoring for common electrical problems, compressor
defects and broad system faults. If a glitch is detected, an

quickly pinpoint the problem. (See Diagnostic Table: 3-Wire
Comfort Alert Module on previous page.)
Schematic Abbreviation Descriptions
HTCO High Temperature Cut Out Switch
HPCO High Pressure Cut Out Switch
LPCO Low Pressure Cut Out Switch
CC Compressor Contactor
ECB Electronic Control Board
(Defrost or Time Delay)
ECB
CC
HTCO
LPCO
HPCO
Comfort Alert
Diagnostics Module
Bold line shows field
installed wiring
Dashed line shows thermostat
demand wiring in system without
HTCO, HPCO, CPCO, and ECB
LOGIC
R
C
Y
Y1
R
C
Wiring Schematic - 3-Wire Comfort Alert Module
Copeland Coresense™ Diagnostics - 3-Wire module

WARNING





The CoreSense™ module is self-contained with no
required external sensors and works with any residential
condensing unit that has a Copeland Scroll™ compressor
inside.