FCM4, FEV, FEM4, FJM, FMA4, FSA4, FSM4, FSU4, FVM4, FXM4, REM4, WAH, WAM, WAP, WAX, WBHL: Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
IF FAN RUNS CONTINUOUSLY:
1. If PCB has no low-voltage power, check blue and black fan leads.
These may be switched at sequencer/relay.
2. If PCB has low-voltage power, check fan relay to see if it is opening
and closing. It may be stuck in the normally closed position due to
debris in relay.
TRANSFORMER FAILURE:
Check 208V and 230V transformer connections. They may be miswired.
A03010
Fig. 1 – Fan Coil Printed Circuit Board (contact FAST for part number)
A13032
Fig. 2 – Electric Heater Control Box
FEM4P, FEM4X, FEV, FJM, FXM4, REM4P,
REM4X, WAHA, WAPM, WAPT, WAPL, WAHM,
WAHT, WAHL, WAXM, WAXT, WAXL, WBHL
MULTI-SPEED ECM FAN MOTOR
The multi-speed ECM motor used with this product contains two parts:
the control module and the motor winding section. Do not assume the
motor or module is defective if it will not start. Go through the steps
described below before replacing control module or entire motor. The
control module is available as a replacement part.
It is normal for the motor to rock back and forth on startup. Do not
replace the motor if this is the only problem identified.
IF THE MOTOR IS NOT RUNNING:
1. Check for proper high voltage and ground at the L,G, and N
connections at the motor. Correct any voltage issue before
proceeding to the next step.
2. The motor is communicated through 24VAC signals to the 1,2,3,4,5
and C (common) terminals. Not all taps are programmed, if low
voltage is applied to an non-programmed terminal, the motor will
not operate, which is normal. Verify the part number of the motor
matches the correct replacement motor part number for the unit
model number.
3. Initiate a demand from the thermostat and check the voltage
between C (common) and terminal 1- 5. If voltage is present and
the motor isn’t operating, then the motor/control module is failed.
PRIOR TO INSTALLING THE REPLACEMENT CONTROL
MODULE, THE MOTOR SECTION CONDITION NEEDS TO BE
VERIFIED.
1. Check to see if the blower wheel spins freely.
2. To check for short to ground, use an ohmmeter to measure the
resistance from any one of the motor connector pins to the
®
®
CPC-E
94V-0
LR40061
HSCI
5 AMP
C
T
G
R
SPT
K1
U1
R7
R9
R10
C8
C7
R2
R3
C3
R6
R11
C4
C6
C5
R8
R5
R4
Q1
C1C2
F1
JW1
R1
Z1
D2
D1
NO
NC
FAN
RELAY
C
C
312753
T-O-D 60TX11
HH19ZA945
C9725
L145-55F
312753
T-O-D 60TX11
HH19ZA945
C9725
L145-55F
SPT
FAN
RELAY
NO
NC
5
PULL TO OPEN
WARNING
ELECTRIC SHOCK
HAZARD
DISCONNECT
REMOTE POWER
SUPPLY BEFORE
OPENING PANEL.
322861-101 REV. A
FF1E CONTROL BOX
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