Repair
66 3A2347ZAA
3. Use a proper non-conductive fuse puller tool to
remove the blown fuse.
4. Use a proper non-conductive fuse puller tool to
install the new fuse.
5. Install electrical enclosure front access door (10).
Replace MZLP
Use See MZLP Identification, page 65.
Disassembly:
1. Turn main power switch OFF.
2. Remove electrical enclosure front access door (10).
3. Disconnect heated hose electrical connectors from
MZLP (112).
4. Note location of each cable, then unplug all cables
from the MZLP (112) that will be replaced. See FIG.
43.
5. Remove four screws (114) securing MZLP (112) to
electrical enclosure (1) then carefully remove MZLP
from electrical enclosure. See FIG.42.
6. If replacing MZLP #1, remove the daughter card and
standoffs, and re-install them on the new MZLP.
See FIG. 42 for MZLP #1 and MZLP #2 identifica-
tion.
Reassembly:
1. Set MZLP rotary switch to “1” on MZLP with daugh-
ter card. Set MZLP rotary switch to “2” on MZLP
without daughter card. See FIG. 43 for rotary switch
location.
2. Use four screws (114) to install MZLP (112) to elec-
trical enclosure (1).
3. Reconnect cables to MZLP (112).
NOTE: Do not force the electrical connection. Minimal
force is required to seat the connector. If resistance is
felt, stop and verify the connector orientation.
NOTE: If unable to determine connector location, see
Electrical Schematics on page 76.
4. Install electrical enclosure front access door (10).
5. Connect heated hose electrical connectors to new
MZLP.
NOTE: MZLP may need updated software. See Soft-
ware Update Procedure on page 74.
Replace MZLP Daughter Card
Disassembly:
1. Turn main power switch OFF.
2. Remove electrical enclosure front access door (10).
3. Note location of each cable then unplug all cables
from MZLP daughter card (112a). See FIG.43.
NOTICE
Using an improper tool, such as screw drivers or pli-
ers may break glass on fuse.
NOTICE
Using an improper tool, such as screw drivers or pli-
ers may break glass on fuse.
FIG.42
114
112
1
ti20910a
MZLP #2
MZLP #1
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