Filter
Top Products
27
SECTION 7 – TROUBLESHOOTING
Use the following troubleshooting guide to help diagnose transfer switch problems. Thoroughly inspection transfer switch wiring and
cable connections. Correct wiring problems before performing any tests or replacing any components.
7.1 Basic Troubleshooting
In case of generator failure, check the following BEFORE calling your installer:
1. Check generator fuel level and refill tank, if necessary (gasoline or diesel gensets).
2. Check generator oil level alert and refill reservoir if necessary.
3. Check generator battery for low or dead cell.
4. Check all power cord and cable connections.
5. Generator main circuit breaker (on generator) should be in the ON position and run switch should be in AUTO position.
7.2 Troubleshooting Guide
PROBLEM POSSIBLE CAUSE SOLUTION SECTION
A. Power Outage
occurs but genset
does not start
1. No power to transfer switch
2. Genset is in MANUAL or OFF mode
3. Genset does not crank
4. Genset cranks but does not start
(Genset cranks 3 x for 10 sec each)
5. No start signal from transfer switch
6. Control Module may be defective
1. Check ATS connection to battery
2. Set genset to AUTO mode
3a. Check genset battery and connections
3b. Start genset in manual mode. If starts, check low
voltage cable from switch to genset.
4.Check genset fuel, spark plugs, refer to genset
manual
5. Check voltage between CRANK and BATT (-) or (if
CRANK/BATT(-) are not used) between ON/OFF
and BATT(-) while switch is attempting to crank
genset. Should be 10.5 to 14 Volts DC.
6. If defective, replace Control Module.
4.3, 4.4
Genset Owners
Manual
4.3
8.4
B. Genset runs but
switch will not
transfer any or all
loads
1. Genset main circuit breaker tripped
2. Genset voltage out of range
3. Genset frequency out of range
4. Utility power restored, genset power
not required.
5. Total loads exceed 85% of genset
continuous rating
6. Largest load exceeds genset
continuous rating
1. Reset circuit breaker on genset
2. Check genset voltage. Switch will not transfer
loads unless genset voltage is 204-270VAC.
Correct genset voltage if out of range
3. Check genset frequency. Switch will not transfer
loads unless genset frequency is 57-63Hz. Correct
genset frequency if out of range
4. Switch will temporarily leave loads on generator.
Wait for switch to complete normal cool down
cycle (up 6 minutes)
5. Not all loads may be powered all of the time by
genset. PowerPause™ Modules will cycle some
loads and this is normal. If all loads need to run
all of the time, remove some loads from switch or
connect switch to larger genset.
6. Check continuous wattage of largest load; largest
load must not exceed genset continuous rating. If
exceeds, remove load from switch or connect
switch to larger genset and reprogram switch.
Genset Owners
Manual
4.5, 6.4
4.5, 6.4
C. Transfer switch
does not retransfer
loads when utility
power is restored
1. Utility voltage out of range
2. Utility frequency out of range
3. Service disconnect is OFF
1. Check utility voltage. Switch will not retransfer
loads unless utility voltage is 204-270VAC. Wait
for voltage to stabilize.
2. Check utility frequency. Switch will not retransfer
loads unless utility frequency is 57-63Hz. Wait for
frequency to stabilize.
3. Turn ON utility service disconnect
D. Genset
continues to run
after retransfer of
loads to utility
1. Genset not accepting shutdown
command
2. Genset cool down cycle running
3. Genset ON signal from switch is ON
after cool down cycle
1. Check genset mode, set to AUTO.
2. Wait 5 minutes after transfer to utility for cool
down cycle to complete.
3. Check voltage between ON and BATT (-). If over 0
Volts DC, controller module is defective, replace.
Genset Owners
Manual
4.3