Checking Compressor - Daikin DX17VSS B Series Service Instructions Manual
Inverter outdoor units with r-410a refrigerant
Hide thumbs
Also See for DX17VSS B Series:
- Installation instructions manual (53 pages) ,
- Installation instructions manual (156 pages) ,
- Installation instructions manual (51 pages)
Table of Contents
SERVICING
7. Locate the 3-circuit connector in the control/end bell.
Using an ohmmeter, check the resistance between
each terminal in the connector. if the resistance is
1 MΩ or greater, the control/end bell is functioning
p r o p e r l y. R e p l a c e t h e c o n t r o l / e n d b e l l i f t h e
resistance is lower than 1 MΩ.
8. Reassemble motor and control/end bell in reverse
of disassembly. Replace blower assembly into air
handler or modular blower.
Motor Checks
HIGH VOLTAGE!
Disconnect ALL power before servicing
or installing. Multiple power sources
may be present. Failure to do so may
cause property damage, personal injury
or death.
1. disconnect power to air handler or modular blower.
NOTE: Motor contains capacitors that can hold a charge for
several minutes after disconnecting power. Wait 5 minutes
after removing power to allow capacitors to discharge.
2. disassemble motor as described in steps 2 through
4 above.
3. Locate the 3-circuit harness from the motor. Using
an ohmmeter, measure the resistance between each
motor phase winding. the resistance levels should
be equal. Replace the motor if the resistance levels
are unequal, open circuited or short circuited.
4. Measure the resistance between each motor phase
winding and the motor shell. Replace the motor if
any phase winding is short circuited to the motor
shell.
5. Reassemble motor and control/end bell in reverse
of disassembly. Replace blower assembly into air
handler or modular blower.
S-17 CHECKING COMPRESSOR
WARNING
Hermetic compressor electrical terminal venting can
be dangerous. When insulating material which
supports a hermetic compressor or electrical terminal
suddenly disintegrates due to physical abuse or as a
result of an electrical short between the terminal and
the compressor housing, the terminal may be
expelled, venting the vapor and liquid contents of the
compressor housing and system.
if the compressor terminal PRotECtivE CovER and gas-
ket (if required) are not properly in place and secured, there
is a remote possibility if a terminal vents, that the vaporous
and liquid discharge can be ignited, spouting flames sever-
al feet, causing potentially severe or fatal injury to anyone
in its path.
this discharge can be ignited external to the compressor
if the terminal cover is not properly in place and if the dis-
charge impinges on a sufficient heat source.
ignition of the discharge can also occur at the venting ter-
minal or inside the compressor, if there is sufficient contam-
inant air present in the system and an electrical arc occurs
as the terminal vents.
ignition cannot occur at the venting terminal without the
presence of contaminant air, and cannot occur externally
from the venting terminal without the presence of an exter-
nal ignition source.
therefore, proper evacuation of a hermetic system is es-
sential at the time of manufacture and during servicing.
to reduce the possibility of external ignition, all open flame,
electrical power, and other heat sources should be extin-
guished or turned off prior to servicing a system.
23
Hide quick links:
Chapters
Table of Contents
Troubleshooting
