TESTING & SERVICE
(continued)
MANUAL LOAD TRANSFER
2. Use the manual handle to manually operate the
transfer switch to the opposite source. Remove the
handle,
if
detachable. See
Section 1,
Manual Opera
tion.
This procedure
will
manually transfer the load
if
the Con
trol Panel is disconnected.
WARNING:
Do not manually operate the
transfer switch until both power sources are
disconnected.
1.
Open normal and emergency source circuit breakers.
3.
If
the transfer switch is
in
the Emergency position
manually start the engine generator and then close
the emergency source circuit breaker.
TROUBLE-SHOOTING
Note any optional accessories that may be furnished on
the switch and review their operation. Refer to any sepa
rate drawings and/or instructions that may be packed with
the switch. Also refer to
Section 5, Optional Accessories.
WARNING:
Proceed with care! The switch is
energized.
Table 3-1. Trouble-Shooting Checks.
CHECK IN NUMERICAL SEQUENCE
PROBLEM
1
2
3
4
OPERATION
GEN-SET
VOLTAGE
CIRCUIT
Gen-Set does not start Hold
TRANSFER TEST
Starting control must
Ohmmeter should in-
when
TRANSFER
switch 15 seconds or
be in automatic posi-
dicate an open circuit
TEST
switch is oper-
the outage must be
tion. Batteries must be
between control panel
ated or when normal
long enough to allow
charged and con-
----
-
terminals CP16 and
source fails.
for Feature 1 time
neeted. Check wiring
CP 17 after Feature 1
delay plus engine
to engine starting con-
time delay.
cranking and starting
tacts.
time.
Transfer switch does
Wait for Feature 2B
Generator output cir-
Voltmeter should read
not transfer the load to time delay to time out.
cuit breaker must be
at least 90% of nomi-
emergency source af-
closed. Generator fre-
nal phase to phase
ter the gen-set starts.
quency must be at
voltage between trans-
-----
least 95% of nominal
fer switch terminals
EA
(57 Hz for a 60 Hz sys-
and EC (or EL
1
and
tem.) ..
EL2 for 2 pole
switches) ...
Transfer switch does
Wait for Feature 3A
Voltmeter should read
not transfer the load to time delay to time out.
at least 90% of nomi-
normal source when
nal phase to phase
normal retums or
voltage between trans-
when the TRANSFER
--
-
-
-
fer switch terminals NB
---
-
-
TEST switch is ra-
and NC, NC and NA,
leased.
and NA and NB (or
NL
1
and NL2 for
2
pole switches).
Gen-Set does not stop Wait for Feature 2E
Starting control must
Ohmmeter should in-
after load retransfer to
time delay to time out.
be in automatic posi-
dicate a closed circuit
the normal source.
tion.
-----
between control panel
terminals CP16 and
CP17 after Feature 2E
time delay.
*
These are factory settings. Refer to
Section 4.
If
the problem is isolated to circuits on the control panel or the transfer switch, call your local ASCO Authorized Repre
sentative, District Office, or Service Center. Furnish the Serial No. and Catalog No. from the transfer switch nameplate.
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