Replace Mzlp - Graco Therm-O-Flow 200 Instructions - Parts Manual

Repair

Replace MZLP

1. Turn the main power switch off.
2. Disconnect the heated hose electrical connectors
from the MZLP (111 or 112).
3. Note the location of each cable, then unplug all
cables from the MZLP (111 or 112) that will be
replaced.
4. Remove the four screws (115) securing the MZLP
(111 or 112) to the electrical enclosure, then care-
fully remove the MZLP from the electrical enclosure.
ti25223a
F . 31: MZLP Identification
IG
5. Replace MZLP.
a. To replace MZLP #1, remove the daughter card
and standoffs, and re-install them on the new
MZLP #1.
b. To replace MZLP #2 of #3, remove the jumper
(162) from MZLP #2 or #3 J5 connector and
reinstall it on the new MZLP J5 connector.
52
115
111
112
112
J5
6. To reassemble the MZLP, set the MZLP rotary
switch based on location. See MZLP Rotary Switch
Table.
7. Use the four screws (115) to install MZLP (111 or
112) to electrical enclosure.
8. Reconnect the cables to the MZLP.
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 the connector location,
see Electrical Schematics, page 59.
9. Connect the heated hose electrical connectors to
the new MZLP.
NOTE: The MZLP may need updated software. See
Update Software, page 58.
Table 10 MZLP Rotary Switch
MZLP System
#1 with Daughter Primary
Card
Secondary
#2 Primary
Secondary
#3 Primary
Secondary
Rotary Switch
1
5
2
6
3
7
334130L