TYPE 2—COMMUNICATION PROBLEM OR UNSUP-
PORTED MODE (AUTO MODEL ONLY)
All indicators flashing at a rate of about once every 8 sec.
Communication is not properly entered or is not working.
A. Case 1
User changes the mode on wall control and HRV does not respond
to command (OFF, LOW, or HIGH speed). Check all wires to wall
control particularly red wire (See Table 14).
B. Case 2
User changes the mode but, HRV does not respond. All indicators
flash at a rate of about once every 8 sec. Check all wires to wall
control particularly green wire. If problem still exists, test wall
control with 5 ft of wire from HRV. If this works, change wall
control module inside HRV.
C. Reset
To reset HRV, proceed as follows:
1. Unplug HRV from 115vac.
2. Wait 15 sec.
3. Plug HRV into 115vac.
TABLE 13—BACK MODE
MODES
WALL CONTROL
BACKUP MODE
OFF OFF
1 INTERMITTENT
2 LOW-SPEED EXCHANGE
3 HIGH-SPEED EXCHANGE
TABLE 14—SYSTEM WIRING COLORS AND CONNECTIONS
CONTROL MODULE
WALL CONTROL
WIRE
WALL CONTROL
Terminal Block No.
Terminal Block
Identification
Color Terminal No. Terminal Identification
J3-9 B Black J1-4 B
J3-8 G Green J1-3 G
J3-7 R Red J1-2 R
J3-6 Y Yellow J1-4 Y
—17—
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