Maintenance; Troubleshooting - Bosch TA025 Installation And Maintenance Manual

Maintenance

TroubleSHooTInG

Problem Possible Cause
No Flow No Power
Low Flow
On/Off Switch Position
Compressor Contactor
Broken or loose wires
Air Lock
Stuck pump shaft/impeller
Defective pump
Kinked or under sized water piping
High Water
Water temp limit closed
Temperature
Low Heat
Scaled or fouled heat exchanger
Output
MAInTenAnCe
1. Filter changes or cleanings are required at
regular intervals. The time period between filter
changes will depend upon type of environment
the equipment is used in. In a single family
home, that is not under construction, changing
or cleaning the filter every 60 days is sufficient.
In other applications such as motels, where daily
vacuuming produces a large amount of lint, filter
changes may be need to be as frequent as
biweekly.
Equipment should never be used during
construction due to likelihood of wall board
dust accumulation in the air coil of the
equipment which permanently affects the
performance and may shorten the life of the
equipment.
2. An annual "checkup" is recommended by a
licensed refrigeration mechanic. Recording the
performance measurements of volts, amps, and
water temperature differences (both heating and
cooling) is recommended. This data should be
compared to the information on the unit's data
plate and the data taken at the original startup of
the equipment.
Revised 03-11 Subject to change without prior notice
Checks and Corrections
Check power supply
Set switch to "ON" position
Engage heat pump contactor
Repair or tighten wires
Purge air from piping system
Remove pump cartridge and clean
Replace pump
Repair kink and check for proper line size
Stuck limit switch
Sensor not attached securely to line
Clean heat exchanger
3. Lubrication of the blower motor is not required,
however may be performed on some motors to
extend motor life. Use SAE-20 non-detergent
electric motor oil.
4. The condensate drain should be checked
annually by cleaning and flushing to insure
proper drainage.
5. Periodic lockouts almost always are caused by
air or water flow problems. The lockout
(shutdown) of the unit is a normal protective
measure in the design of the equipment. If
continual lockouts occur call a mechanic
immediately and have them check for: water flow
problems, water temperature problems, air flow
problems or air temperature problems. Use of
the pressure and temperature charts for the unit
may be required to properly determine the
cause.
6 720 220 046
15
TA Series