Trane Rtaaiom3 Manual

131RTAA-IOM-3
Periodic
Maintenance
General
Perform all maintenance procedures
and inspections at the recommended
intervals. This will prolong the life of
the equipment and minimize the
possibility of costly failures.
Use an “Operator’s Log”, such as that
shown in Figure 58, to record an
operating history for the unit. The log
serves as a valuable diagnostic tool for
service personnel. By observing trends
in operating conditions, an operator
can anticipate and prevent problem
situations before they...

132RTAA-IOM-3
Figure 58
Operator’s Log 

133RTAA-IOM-3
Refrigerant Emission
Control
Evidence from environmental scientists
indicates that the ozone in our upper
atmosphere is being reduced, due to
the release of CFC fully halogenated
compounds.
The Trane Company encourages every
effort to eliminate, if possible, or
vigorously reduce the emission of CFC,
HCFC and HFC refrigerants into the
atmosphere that result from
installation, operation, routine
maintenance, or major services on this
equipment. Always act in a responsible
manner to conserve...

134RTAA-IOM-3
[  ] If operating pressures and sight
glass conditions seem to indicate
refrigerant shortage, measure the
system superheat and system
subcooling. Refer to “System
Superheat” and “System
Subcooling”.
[  ] If operating conditions indicate a
refrigerant overcharge, remove
refrigerant at the liquid line service
valve. Allow refrigerant to escape
slowly, to minimize oil loss. Do not
discharge refrigerant into the
atmosphere.
WARNING: Do not allow
refrigerant to directly contact
skin or injury...

135RTAA-IOM-3
Maintenance
General
This section describes specific
maintenance procedures which must
be performed as a part of the normal
maintenance program for this unit. Be
certain that electrical power to the unit
is disconnected before performing
these procedures.
WARNING: Position all electrical
disconnects in the “OPEN”
position and lock them, to
prevent injury or death due to
electrical shock.
Coil Cleaning
Clean the condenser coils at least once
each year, or more frequently if the unit
is...

136RTAA-IOM-3
Water Treatment
The use of untreated or improperly
treated water in the unit may result in
the formation of scale, algae, or slime.
It may also cause erosion or corrosion.
It is recommended that a qualified
water treatment specialist provide
recommendations for proper water
treatment. The Trane Company
assumes no responsibility for
equipment failure caused by the use of
untreated or improperly treated water.
Oil Separator Level
Check
Follow the steps listed below and refer
to the notes...

137RTAA-IOM-3
Figure 60
System Oil Level Specifications
Caution: Do not check oil level with
machine operating. Severe oil loss
will occur.
Caution: When checking oil level
wear protective clothing since oil
will spray when discharged.
Insure that the apex of the line above
the sight glass is as high as possible, to
eliminate liquid traps which can give
erroneous readings. 

138RTAA-IOM-3 

139RTAA-IOM-3 UNIT OPERATING  STATUS COMPRESSOR  OPERATING  STATUS
CODE DESCRIPTION CODE DESCRIPTION
Blank UCM Power Off 00Compressor Stop
888888.8 UCM Paw Up 16 Compressor  Lockout
00 Unit Stop 17 Cprsr Service Pumpdown
01 Auto-Local 70 Cprsr Restart Inhibit
02 Auto-Remote 72 Cprsr Start
17 Service Pumpdown 74 Run Normal
70 Unit Restart Inhibit 75 Run:Current Limit
72 Unit Start 76 Run: Condenser Limit
74 Run:Normal 1 77 Run:Evaporator Limit
75 Run :Current Limit 7E Run:Unload
78 Run ;Condenser Limit
77...

For further information on this product or other Trane products, refer to the “Trane Service Literature
Catalog,” ordering number IDX-IOM-1. This catalog contains listings and prices for all service literature
sold by Trane. The catalog may be ordered by sending a $15.00 check to:
The Trane Company, Service Literature Sales, 3600 Pammel Creek Road, La Crosse, WI 54601.
To help ensure optimum performance, be sure to specify quality Trane parts.
Printed by Production Services – La Crosse
RTAA-IOM-3