Inverter Assembly With Shield Gasket Installation - Bryant 189BNV EVOLUTION Service Manual

INVERTER ASSEMBLY w SHIELD GASKET REMOVAL AND INSTALLATION
(Reference RCD Instruction # 99TA512018) Also see figures 40 through 41
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Turn off the electrical supplies to the unit before performing
any maintenance or service. Follow the operating instructions
on the label attached to the unit
CAUTION
!
ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in unit damage or
improper operation.
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation.
IMPORTANT: DO NOT USE POWER TOOLS TO
TIGHTEN THE INVERTER INPUT SCREW TERMINALS
Removing Inverter:
1. Remove power to the unit. Wait a minimum of two minutes
before servicing the unit to allow inverter capacitors to
discharge. Follow safety instructions located on unit control
box cover.
2. Precautions must be taken when servicing components
within the control box of this unit. The technician
performing the service must determine that it is safe to work
on or near the inverter. The electrical disconnect that
provides power to the unit must be turned off, locked and
tagged out. This will insure that no damage will occur to the
inverter, controls or other equipment and will prevent injury
if contact is made with the electrical equipment.
3. Remove the control box cover.
4. The inverter capacitors are covered with a protective shield.
The shield should not be removed from the inverter.
5. Before servicing the inverter, verify the inverter voltage is
zero. Measure the DC voltage at the DC + VOLTAGE and
DC - - VOLTAGE terminals on the inverter adjacent to the
capacitors to ensure that they have totally discharged.
The voltage at these terminals must be 0 (zero) before
servicing (see following figures).
6. After verifying the voltage has dissipated to zero,
disconnect wiring from the inverter.
7. Disconnect three compressor power wires. Note wire color
order – Yellow, Red, and Black.
8. Disconnect fan motor power harness plug.
9. Disconnect reversing valve / PEV plug. (See Figure Below)
10. Disconnect high pressure switch plug.
11. Disconnect EXV plug.
12. Disconnect suction pressure transducer plug.
13. Disconnect suction thermistor plug.
14. Disconnect discharge thermistor plug.
15. Disconnect OAT/OCT plug.
16. Disconnect control
connections)
17. Disconnect two input power wires. Note wire color order –
Black and Yellow.
18. Disconnect inverter ground lead. Note wire color – Green
w/ Yellow Stripe.
19. Remove 12 mounting screws and pull out inverter with
cover intact.
Installing New Inverter:
1. Install inverter into control box. Attach (12) mounting
screws.
2. Re- -connect inverter ground lead. Note wire color – Green
w/ Yellow Stripe.
3. Re- -connect two input power wires. Note wire color order- -
Black and Yellow.
4. Re- -connect control
connections)
5. Re- -connect OAT/OCT plug.
6. Re- -connect discharge thermistor plug.
7. Re- -connect suction thermistor plug.
8. Re- -connect suction pressure transducer plug.
9. Re- -connect EXV plug.
10. Re- -connect high pressure switch plug.
11. Re- -connect reversing valve / PEV plug.
12. Re- -connect fan motor power harness plug.
13. Re- -connect three compressor power wires. Note wire color
order- - Yellow, Red and Black.
14. Replace the control box cover.
15. Apply power to the unit.
28
wiring (ABCD or thermostat
wiring (ABCD or thermostat