20
21
HR
V
TROUBLE SHOOTING GUIDE
OPERA
TION GUIDE
PROBLEM
PROBABLE CAUSE
SOLUTION
PERSISTENT
CONDENSA
TION
ON
WINDOWS
IMPROPER
ADJUSTMENT
OF DEHUMIDIST
A
T(S).
ADJUST
DEHUMIDIST
A
T(S)
T
O CORRECT
RH READING (see
operation manual),
ADJUST
T
O
A
LOWER SETTING.
CHECK OPERA
TION OF DEHUMIDIST
A
T, IF DEFECTIVE, REPLACE.
INST
ALL
A
DEHUMIDIST
A
T
IN LIVING
AREA
OF HOME.
IMPROPER
VENTILA
TION RA
TE.
ENSURE HR
V
IS ON CONTINUOUSL
Y
.
INCREASE F
AN SPEED. BALANCE SYSTEM.
DEFROST
NOT
WORKING.
BROKEN DAMPER BLADE
ASSY
.
REPLACE.
FRESH
AIR DUCT
FROZEN
OR
VER
Y
COLD
(DEFROST
LIGHT
COMES ON) .
FAILED MAIN CONTROL
BOARD.
IF DAMPER DOOR DOES NOT
OPERA
TE DURING “ST
AR
T
UP
SELF DIAGNOSTIC” BUT
POWER LIGHTS
ARE ON, BOARD MA
Y
REQUIRE REPLACEMENT
.
DEFECTIVE DAMPER MOT
OR.
REPLACE.
INSPECT
CONNECTION BETWEEN MOT
OR SHAFT
AND DAMPER,
COUPLING MA
Y
BE LOOSE.
HUMIDITY
LEVEL
T
OO LOW
HR
V
AIR FLOWS IMPROPERL
Y
BALANCED.
BALANCE HR
V
DEHUMIDIST
A
T
CONTROL
SET
T
O LOW
.
SET
DEHUMIDIST
A
T
T
O
A
HIGHER SET
POINT
.
LIFE STYLE OF OCCUP
ANTS.
HUMIDITY
MA
Y
HA
VE
T
O BE
AR
TIFICIALL
Y
ADDED,
i.e. HUMIDIFIER.
VENTILA
TION RA
TE
T
OO HIGH
ADJUST
T
O LOWER F
AN SPEED OR INTERMITTENT
HUMIDITY
LEVEL
T
OO HIGH
HR
V
AIR FLOWS IMPROPERL
Y
BALANCED
BALANCE HR
V
HR
V
UNDERSIZED.
