T R O U B L E S H O O T I N G T R E E S
MN-36008 (Rev. 8) 01/16 • COMBITHERM CT EXPRESS • D-28
N o H o o d O p e r a t i o n
Is L1 power at F5 5A fuse
terminal 2?
Is L1 power at F5 5A fuse
terminal 1?
Repair wiring between TB
16 F5/2
No
Yes
Yes
No
No
Yes
Replace blown fuse
Repair wring between F5 fuse
and hood switch terminal 4
Is L1 power at hood switch
terminal 4?
No
Is L1 power at hood switch
terminal 3?
Replace faulty hood switch
Is L1 power at common
terminal of FSW1?
Repair wring between hood switch
terminal 3 and FSW1
Are hood filters installed
and the hood door
closed?
Install hood filters, close door
and retest
Is L1 power at N/O terminal
of FSW1?
No
Yes
Yes
No
No
Yes
Yes
Ensure safety switch is being
depressed by the filter. Realign
and/or replace FSW1 As required
Is there voltage at hood fan
and is hood fan operating?
No
Yes
Is L1 power at common
terminal of FSW2?
Repair wring between FSW1
N/O and FSW2 Common
No
Yes
Is L1 power at N/O terminal
of FSW2?
Ensure safety switch is being
depressed by the filter. Realign
and/or replace FSW2 As required
No
Yes
Is hood pressure switch
closing?
Yes
No
No
No
Yes
L1 is supplied from FSW2 N/O open,
L2 supplied from TB 19. Repair
wiring/ replace motor as required
Clean/replace filter(s) as
required
Are filters clean (less than
25% blockage)?
Test pressure at switch (.25” w.c required
for switch to close). If pressure not present,
inspect filters and pressure tube between
hood cavity and hood pressure switch
Yes
Hood is operating
properly
Is L1 power at TB 16?
L1 supplied from RBH
X4/414
Содержание CT EXPRESS 4 10ESi
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