ER200 PERFECT WINDOW™ FRESH AIR VENTILATION SYSTEM
68-0131—2
14
ROTATE FRESH AIR CONTROL KNOB TO MIN. PRESS
THE SYSTEM TEST BUTTON ON THE VENTILATOR
CABINET AND HOLD DOWN FOR 2 TO 4 SECONDS.
NEON TEST LAMP SHOULD BE ON DURING THIS TIME.
LEVEL 7
LEVEL 8
YES
OBSERVE FRESH AIR
CONTROL LED IS ON.
LEVEL 9
NO
LEVEL 10
ROTATE FRESH AIR
CONTROL KNOB TO
AUTO AND OBSERVE
THAT LED IS OFF.
YES
TURN POWER SWITCH AT VENTILATOR TO
OFF. DISCONNECT WIRES AT #5 AND #6
TERMINALS ON THE MASTER CONTROL
MODULE. CHECK RESISTANCE BETWEEN
THE TWO REMOVED WIRES, NOT TO BE
LESS THAN 4K OHMS.
NO
SHORT MASTER CONTROL MODULE
TERMINALS #1 AND #2 TOGETHER.
OBSERVE INCREASED AIRFLOW.
YES
USING AN OHM METER, CHECK
RESISTANCE BETWEEN EACH
OF THE TWO REMOVED WIRES
AND EACH OF THE REMAINING
WIRES AND EACH OF THE
REMAINING WIRES CONNECTING
THE FRESH AIR CONTROL.
RESISTANCE SHOULD BE
GREATER THAN 5K OHMS.
SHORT FRESH AIR CONTROL TERMINALS #1
AND #2. OBSERVE INCREASED AIRFLOW.
CONNECT POWER TO VENTILATOR. CONNECT AN AC VOLTMETER
TO MONITOR INPUT VOLTAGE TO THE VENTILATOR WHILE
DEPRESSING THE SYSTEM TEST BUTTON FOR 2 TO 4 SECONDS.
OBSERVE THAT VOLTAGE DOES NOT DROP BELOW 208 VOLTS.
YES
REPLACE TEMPERATURE
CONTROL MODULE.
VOLTAGE
ACCEPTABLE
CORRECT DEFICIENT WIRING FROM
BREAKER PANEL TO THE VENTILATOR.
HEAVIER WIRE MAY BE REQUIRED.
NO
ACTUATE DEHUMIDISTAT AND
OBSERVE INCREASED AIRFLOW.
NO
REPAIR FAULTY WIRING
BETWEEN DEHUMIDISTAT AND
MASTER CONTROL MODULE.
NO
ROTATE FRESH AIR CONTROL TO
MIN POSITION AND OBSERVE
DECREASE IN AIRFLOW.
YES
NO
ROTATE FRESH AIR CONTROL KNOB TO AUTO AND TURN
OFF DEHUMIDISTAT AND OTHER REMOTE SWITCHES. WITH
BLOWER OFF, PRESS THE SYSTEM TEST BUTTON ON THE
VENTILATOR CABINET AND HOLD DOWN FOR 2 TO 4
SECONDS. TEST LAMP SHOULD REMAIN OFF.
YES
TEST LAMP OFF
OR FLASHED ON
AND WENT OUT
NORMAL FUNCTION
CONFIRMED.
DISCONNECT POWER FROM VENTILATOR
AND UNPLUG HEATER USING AN OHM
METER. VERIFY RESISTANCE TO BE
BETWEEN 15 AND 25 OHMS.
YES
LEVEL 6
CORRECT FAULTY WIRING
BETWEEN FRESH AIR
CONTROL AND MASTER
CONTROL MODULE.
REPLACE FRESH
AIR CONTROL.
CORRECT FAULTY WIRING
BETWEEN FRESH AIR CONTROL
AND MASTER CONTROL MODULE.
REPLACE FRESH
AIR CONTROL.
REPLACE MASTER
CONTROL MODULE IN
VENTILATOR CABINET.
REMOVE SHORT FROM TERMINALS
#1 AND #2 AT DEHUMIDISTAT AND
OBSERVE INCREASED AIRFLOW.
LOW VOLTAGE
CONFIRMED
REPLACE HEATER
FAULT
FOUND
CORRECT
NO FAULT FOUND
REPLACE FAULTY
DEHUMIDISTAT.
PLUG IN HEATER
YES
GREATER
THAN 4K
OHMS.
DISCONNECT ALL WIRES AT FRESH AIR
CONTROL AND PREVENT FROM SHORTING.
CHECK RESISTANCE BETWEEN WIRES
REMOVED FROM MASTER CONTROL MODULE
TERMINALS #5 AND #6. RESISTANCE SHOULD
BE GREATER THAN 6K OHMS.
NO
REPLACE FRESH
AIR CONTROL.
NO
LESS THAN
5K OHMS
DISCONNECT OTHER END OF
THESE SAME WIRES AT THE FRESH
AIR CONTROL AND CHECK
RESISTANCE BETWEEN THEM.
GREATER
THAN 5K OHMS
YES
VERIFY HEATER AND
MASTER CONTROL MODULE
CONNECTORS ARE
PLUGGED IN PROPERLY
REPAIR FAULTY WIRING
BETWEEN FRESH AIR
CONTROL AND MASTER
CONTROL MODULE.
SHORT HUMIDISTAT TERMINAL #1 AND #2
AND OBSERVE INCREASED AIRFLOW.
WITH DEHUMIDISTAT CONNECTED DIRECTLY
TO MASTER CONTROL MODULE.
WITH DEHUMIDISTAT CONNECTED
TO FRESH AIR CONTROL.
YES
NO
YES
NO
REPAIR FAULTY WIRING
BETWEEN DEHUMIDISTAT AND
FRESH AIR CONTROL.
REPLACE FAULTY
DEHUMIDISTAT.
YES
NO
LESS THAN 4K OHMS.
ER200A1018 ONLY
LEVEL 5
PLACE RANGE SWITCH IN LOW
POSITION AND OBSERVE
DECREASED AIRFLOW
YES
DISCONNECT HI-SPEED OVERRIDE DEVICE FROM TERMINALS #1 AND #2 AT DEVICE
(TIMER, DEHUMIDISTAT, ETC.) AND AT VENTILATOR MASTER CONTROL MODULE.
REPLACE MASTER
CONTROL MODULE.
NO
NO DECREASE BLOWER RUNS
DECREASE OBSERVED
CORRECT SHORTED
WIRING OR DEVICE.
M5308A
Fig. 13. ER200 system check and troubleshooting procedures for Levels 5 through 10.
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