2
DANGER
Failure to follow these procedures may result in personal inju-
ry or death.
DO NOT work on high-voltage equipment unless you are a
qualified electrician.
DO NOT WORK ON electrical components, including control
panels, switches, VFD, or oil heater until you are sure ALL
POWER IS OFF and no residual voltage can leak from capaci-
tors or solid-state components.
LOCK OPEN AND TAG electrical circuits during servicing.
IF WORK IS INTERRUPTED, confirm that all circuits are
de-energized before resuming work.
AVOID SPILLING liquid refrigerant on skin or getting it into
the eyes. USE SAFETY GOGGLES. Wash any spills from
the skin with soap and water. If liquid refrigerant enters the
eyes, IMMEDIATELY FLUSH EYES with water and con-
sult a physician.
WARNING
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and goggles
and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from system
using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen and
the work area should be well ventilated. Refrigerant in
contact with an open flame produces toxic gases.
d. Cut component connection tubing with tubing cutter and
remove component from unit. Use a pan to catch any oil
that may come out of the lines and as a gauge for how
much oil to add to the system.
e. Carefully un-sweat remaining tubing stubs when neces-
sary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal inju-
ry or death.
WARNING
DO NOT ATTEMPT TO REMOVE fittings, covers, etc.,
while chiller is under pressure or while chiller is running. Be
sure pressure is at 0 psig (0 kPa) before breaking any refriger-
ant connection.
CAUTION
USE only repair or replacement parts that meet the code re-
quirements of the original equipment.
PERIODICALLY INSPECT all valves, fittings, and piping for
corrosion, rust, leaks, or damage.
DO NOT re-use compressor oil or any oil that has been ex-
posed to the atmosphere. Dispose of oil per local codes and
regulations.
DO NOT leave refrigerant system open to air any longer than
the actual time required to service the equipment. Seal circuits
being serviced and charge with dry nitrogen to prevent oil con-
tamination when timely repairs cannot be completed.
CAUTION
Failure to follow these procedures may result in personal inju-
ry or damage to equipment.
TO AVOID an electric shock hazard, verify that the voltage on
the bus capacitors has discharged completely before servicing.
Check the DC bus voltage at the power terminal block by mea-
suring between the +DC and –DC terminals, between the +DC
terminal and the chassis, and between the –DC terminal and
the chassis. The voltage must be zero for all 3 measurements.
THE USER is responsible to conform with all applicable local,
national, and international codes. Failure to observe this
precaution could result in damage to, or destruction of, the
equipment.
THIS DRIVE contains ESD (electrostatic discharge) sensitive
parts and assemblies. Static control precautions are required
when installing, testing, servicing or repairing this assembly.
Component damage may result if ESD control procedures are
not followed. Typical ESD protections are ESD mat and
grounded wrist strap.
DO NOT alter the setting of any jumper. Failure to observe
this precaution could result in damage to, or destruction of, the
equipment.
USE OF power correction capacitors on the output of the drive
can result in erratic operation of the motor, nuisance tripping,
and/or permanent damage to the drive. Remove power
correction capacitors before proceeding. Failure to observe this
precaution could result in damage to, or destruction of, the
equipment.
MOST CODES require that upstream branch circuit protection
be provided to protect input power wiring.
DO NOT route signal and control wiring with power wiring in
the same conduit. This can cause interference with drive opera-
tion. Failure to observe this precaution could result in damage
to, or destruction of, the equipment.
DISTRIBUTION SYSTEM short circuit capacity shall not ex-
ceed the rating of the drive. Failure to observe this precaution
could result in damage to, or destruction of, the equipment.
DO NOT STEP on refrigerant lines. Broken lines can whip
about and release refrigerant, causing personal injury.
DO NOT climb over a chiller. Use platform, catwalk, or stag-
ing. Follow safe practices when using ladders.
USE MECHANICAL EQUIPMENT (crane, hoist, etc.) to lift
or move inspection covers or other heavy components. Even if
components are light, use mechanical equipment when there is
a risk of slipping or losing your balance.
BE AWARE that certain automatic start arrangements CAN
ENGAGE THE VFD, TOWER FAN, OR PUMPS. Open the
disconnect ahead of the VFD, tower fans, or pumps.
