Modtech CHG-50 Operator'S Manual Download Page 2

6.

  

CHARGER IS RATED FOR 115 VAC OPERATION

.  Use charger 

only with appropriate electrical outlets. 
 

7.

  

UNPLUG CHARGER WHEN NOT IN USE

.  Remove battery pack as 

well. 
 

8.  TO REDUCE USE OF ELECTRIC SHOCK

 always unplug charger 

before cleaning or maintenance.  Use of a Ground Fault Circuit 
Interrupter is recommended to reduce shock hazards. 
 

9.  DO NOT DISASSEMBLE

.  Charger contains no user serviceable 

parts and should not be disassembled under any circumstances.  If faulty 
operation is suspected, return charger for inspection and service if 
required. 
 

10.

  

AVOID SHORT CIRCUITS

.  A short circuit will result if conductive 

materials such as wires, metal tools, coins, keys, salt water, or other 
conductive objects contact the positive and negative terminals of the 
charger at the same time.  A short circuit may cause sparks, excessive 
heat, fire, personal injury, or other equipment damage. 
 

11.

  

STORE CHARGER IN A COOL, DRY PLACE

.  Avoid leaving the 

charger in direct sunlight, vehicle cabs, compartments, or unventilated 
storage buildings during hot summer conditions.  Under extreme 
temperature conditions damage may occur.  Avoid allowing charger to 
become wet or damp.  Allow damp or wet charger to dry thoroughly 
before using. 
 
 

WARNING

 

READ AND SAVE THESE INSTRUCTIONS FOR 

FUTURE USE.

 

Failure to follow all instructions may result in electrical shock, fire, 

equipment damage, and/or serious personal injury. 

FUNCTIONAL DESCRIPTION 

 
 
 
 
 
 
 

 

 
 
 
 
 
 

TABLE 1 – CHARGER LED OPERATION 

 
 
 
 
 
 
 
 
If either the charger or battery pack is too hot (fast flashing) or too cold 
(slow flashing), the charger will wait until the temperature is in the 
acceptable range before charging.  Once charging is underway, the LED 
will be mostly on, blinking off for a short time at 5-second intervals.  
When charging is complete, the LED will be mostly off, with only a brief 
flash every 2 seconds.  If an error is detected, the charger will flash a 
dot-dash pattern.  In this case the battery pack must be removed and 
may be re-installed.  If charging does not proceed normally when the 
pack is re-installed, the battery pack may be damaged and should be 
retired from service and sent for inspection and repair if needed. 

VENTILATION 

HOLES 

LED 

ELECTRIC 

CORD 

(NOT VISIBLE) 

BATTERY 

CONNECTOR

INFORMATION 

LABELS 

CHG-50

24 Volt 

Lithium Ion 

Battery Charger

 

 CHARGE 

COMPLETE 

   CHARGING 

   TOO 

HOT 

 

 

 

 

TOO COLD 

   BATTERY 

FAILURE

VENTILATION 

HOLES 

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