SERVICING
23
INDOOR UNIT TROUBLESHOOTING
AUXILIARY ALARM SWITCH
The control is equipped with a 24VAC Aux Alarm to be used
for a condensate switch install (designated by
CONDENSATE IN/OUT on the control). By default, the
connected AUX switch is normally closed and opens when
the water level in the evaporator coil base pan reaches
an undesirable level. The control responds by displaying
a “EDF” error code and turning off the outdoor condens
-
ing unit. If the AUX switch is detected to be in the closed
position for 30 seconds, normal operation resumes and the
error message is no longer displayed.
CIRCULATOR
BLOWER
This air handler is equipped with a variable speed circulator
blower. This blower provides several automatically-adjusted
blower speeds. The Specification Sheet applicable to your
model provides an airflow table, showing the relationship
between airflow (CFM) and external static pressure (E.S.P.).
VR1
C1
R13
L1
J20
U6
TB3
TB4
R
27
R
26
AUX ALARM
J19
TB1
TB2
FH1F1UFH2
D1
J1
J2
L5
F2U
FH3 FH4
C2
C62 C4
R25
PB3
U1
U9 U11
J6
J7
OR
J8 J9 J16 J17
J18
EEV
BL
RB
M
YL TS
TC
BK
THERMISTOR
(HEAT EXCHANGER 1,2)
INTEGRATION
TYPE
PRESSURE
SENSOR
INDOOR UNIT
PCB
COMMUNICATING BOARD
FIGURE 19
PB2
J13
GY
BK
YL
U7
D
2
C
63
U
2
L2
VR
2
PB1
J1
2
RD
OR
J3
J4
TB5
TB7
TB6
C
89
R
14
6
R
63
R
62
C
5
U
8
J1
1
J1
5
J1
4
R
15
R
14
U
4
L4
U
5
U
12
U
10
J1
0
J5
K3
K1
K2
WARNING
HIGH VOLTAGE
Disconnect ALL power before servicing or in-
stalling this unit. Multiple power sources may
be present. Failure to do so may cause proper-
ty damage, personal injury or death.
