York P2MP Series, Installation Instructions Manual

Page: 16 / 24

No
No
No
No
No
Yes Yes
Yes Yes
Check wiring. If OK
replace module.
Energize the system
and check for
proper operation.
Replace circulator
blower connection.
Energize system at
main fuse or circuit
breaker.
Replace circulator
blower. Energize the
system and check for
proper operation
Yes
Yes
No
No
No
No
No
No
Yes
Yes
Yes Yes
Check wiring. If OK,
replace module, energize
the system and check
for proper operation.
Replace circulator
blower. Energize the
system and check for
proper operation
Yes
Yes
No
Satisfy call for cool.
Replace open fuses
in 120 volt supply.
Energize system and
check for proper operation
Replace open fuses
in 120 volt supply.
Energize system and
check for proper
operation.
Replace transformer.
Energize system and
check for operation.
Energize system and
check for proper
operation.
Replace thermostat.
Energize system and
check for proper
operation.
System is
functioning
properly.
No
Yes
No
System is
functioning
properly.
Unplug circulator
blower wires and
connect voltmeter
across terminals.
Disconnect electric
power to system
at main fuse or
circuit breaker.
Call for continuous fan. Thermostat
(G to R) contacts close.
FAN ONLY CHECK
COOLING CYCLE CHECK
Does the
circulator blower
energize at cool
speed?
Is
25 volts present
across terminals
Y & C?
Is
25 volts present
across terminals
R & C?
Is
25 volts present
across secondary of
transformer?
Is
120 volts present
across primary of
transformer?
Energize
module, check for
120 v across circulator
cool & CIR neutral
Energize system.
Does circulator blower
energize at cool
speed?
Is
25 volts present
across terminals
R & C?
Is
25 volts present
across secondary of
transformer?
Is
120 volts present
across primary of
transformer?
Disconnect electric
power to system
at main fuse or
circuit breaker.
Replace thermostat.
Energize system and
check for proper
operation.
Energize system and
check for proper
operation. Replace transformer.
Energize system and
check for operation.
Unplug circulator
blower wires and
connect voltmeter
across terminals.
Energize
module, check for
120 v across circulator
cool & CIR
neutral
Replace circulator
blower connection.
Energize system at
main fuse or circuit
breaker.
Energize system.
Does circulator blower
energize at cool
speed?
System is
functioning
properly.
Is
25 volts present
across terminals
Y & C?
Does the
circulator blower
energize at cool
speed?
Call for cool. Thermostat
(Y to R) contacts close.
650.69-N3
16 Unitary Products Group