Service Instructions

SERVICING
98
- Connectors are oriented "down"
(
or as recommended b
y
equipment manufacturer
)
.- Arran
g
e harnesses with "drip loop" under motor.
-
I
s con
d
ensa
t
e
d
ra
i
n p
l
u
gg
e
d?
-
Ch
ec
k
f
or
l
ow a
i
r
fl
ow
(t
oo muc
h
l
a
t
en
t
capac
ity)
.
-
Check
for
undercharged
condition
. -
Check
and
plug
leaks
in
return
ducts
,
cabinet
.
*Moisture Check
I
mpor
t
an
t
N
o
t
e:
U
s
i
n
g
th
e wron
g
mo
t
or
/
con
t
ro
l
mo
d
u
l
e vo
id
s a
ll
pro
d
uc
t
warran
ti
es an
d
ma
y
pro
d
uce unexpec
t
e
d
resu
lt
s.
Note:
You must use the correct replacement control/motor module since the
y
are factor
y
pro
g
rammed for specific operatin
g
modes. Even thou
g
h the
y
look alike, different modules ma
y
have completel
y
different
functionality. The ECM variable speed motors are c
CHART CONTINUED FROM PREVIOUS PAGE.
Symptom Fault Description(s) Possible Causes Corrective Action Cautions and Notes
- Stays at low CFM despite system call for cool or heat CFM.
- 24 Vac w ires misw ired or loose. - "R" missing/not connected at motor. - Fan in delay mode.
- Check low voltage (Thermostat) w ires and connections. - Verify fan is not in delay mode - w ait until delay complete. - Perform motor/control replacement check, ECM motors only.
- Turn pow er OFF prior to repair. Wait 5 minutes after disconnecting pow er before opening motor. - Handle electronic motor/control w ith care.
- Stays at high CFM.
- "R" missing/not connected at motor. - Fan in delay mode.
- Is fan in delay mode? - w ait until delay time complete. - Perform motor/control replacement check, ECM motors only.
- Turn pow er OFF prior to repair. Wait 5 minutes after disconnecting pow er before opening motor. - Handle electronic motor/control w ith care.
- Blow er w on't shut off.
- Current leakage from controls into G, Y, or W.
- Check for Triac switched t'stat or solid state relay.
- Turn pow er OFF prior to repair.
- Air noise.
- High static creating high blow er speed. - Incorrect supply or return ductw ork. - Incorrect or dirty filter(s). - Incorrect blow er speed setting.
- Check/replace filter. - Check/correct duct restrictions. - Adjust to correct blow er speed setting.
- Turn pow er OFF prior to repair.
- Noisy blow er or cabinet.
- Loose blow er housing, panels, etc. - High static creating high blow er speed. - Air leaks in ductw ork, cabinets, or panels.
- Check for loose blow er housing, panels, etc. - Check for air w histling thru seams in ducts, cabinets or panels. - Check for cabinet/duct deformation.
- Turn pow er OFF prior to repair.
- "Hunts" or "puffs" at high CFM (speed).
- High static creating high blow er speed. - Incorrect or dirty filter(s). - Incorrect supply or return ductw ork. - Incorrect blow er speed setting.
- Does removing panel or filter reduce "puffing"? - Check/replace filter. - Check/correct duct restrictions. - Adjust to correct blow er speed setting.
- Turn pow er OFF prior to repair.
- Evidence of Moisture.
- Motor failure or malfunction has occurred and moisture is present.
- Moisture in motor/control module.
- Replace motor and perform Moisture Check.*
- Turn pow er OFF prior to repair. Wait 5 minutes after disconnecting pow er before opening motor. - Handle electronic motor/control w ith care.
- Excessive noise.
Troubleshooting Chart for GE/Regal-Beloit ECM Variable Speed Air Circulator Blower Motors
- Motor starts, but runs erratically.