SYSTEMS EXPLAINED
BATTERY PACK: VOLTAGE CUT OFF SYSTEM
1. To reduce potential of excessively low charge levels in Cells, “m”
Series Battery Pack incorporates Voltage Cut Off System.
2. Battery Pack automatically shuts Off when Voltage Cut Off System
detects current at or below Cut Off Level.
3. Cut Off Level in m4 Battery Pack is 3.9V (.9V per Cell).
4. Cut Off Level in m3 Battery Pack is 2.7V (again .9V per Cell).
5. Nominal Voltage in m4 Battery Pack is 4.8V (1.2V per Cell).
6. Nominal Voltage in m3 Battery Pack is 3.6V (again 1.2V per Cell).
RECHARGER: NEGATIVE DELTA V SYSTEM
1. “m” Series Recharger has ability to read Voltage in Battery Pack
Cells.
2. When decline in Voltage is detected (Negative Delta V), Battery
Pack is assumed to have a full charge.
3. Once detected, Recharger switches recharging rate from “full
current” recharging to “trickle current” recharging to reduce potential
of overcharging Cells.
RECHARGER: TRICKLE CURRENT RECHARGING SYSTEM
1. Trickle Current Recharging protects Cells from overcharging.
2. Trickle Current Recharging further enables each Cell to reach its full
capacity potential.
a. Each Cell within Battery Pack self-discharges during extended
periods of storage and inactivity (including prior to first use ever).
b. Because Cells self-discharge at various rates, charge levels
within Cells often become “unbalanced” with other Cells in
Battery Pack.
c. During subsequent recharging, one Cell may reach full charge
before others, may cause brief decline in Voltage, may trigger
Negative Delta V System, and may subsequently cause
Recharger to switch to Trickle Current Recharging.
d. This early switch to Trickle Current Recharging causes
Recharger LED to become Green and suggests Battery Pack is
at full charge and full capacity potential. However, full capacity
potential may not have been reached if removed from Recharger
shortly after Green LED.
e. To reach full capacity potential, Trickle Current Recharging of
Battery Pack MUST continue for 48 to 72 hours uninterrupted.
(See RECHARGING BATTERY PACKS and CONDITIONING
CHARGE in OPERATING INSTRUCTIONS.)
TROUBLESHOOTING
KEY TO TROUBLESHOOTING
1. Symptom: (As described by end-user or as seen by retailer.)
2. Situation: (The known cause which may or may not pertain to case-at-hand.)
3. Solution: (The recommended action to change or correct the symptom.)
BATTERY PACK:
SETTING 4 KEEPS RESETTING TO SETTING 3
1. Symptom: When at Setting 4, Battery Pack keeps turning down to
setting 3.
2. Situation: Battery Pack has two Settings 4. “Timed Setting 4”
automatically resets to Setting 3 in three minutes. “Continuous
Setting 4” must be deliberately selected and remains on Setting 4
until another Setting is deliberately selected.
3. Solution: See OPERATING INSTRUCTIONS and CAUTIONS
REGARDING BURNS.
BATTERY PACK:
LEDS ALL FLASH SIMULTANEOUSLY WHEN RECHARGING
1. Symptom: When Battery Pack is connected to Recharger, all Battery
Pack LEDs begin flashing simultaneously and remain flashing until
unplugged from Recharger.
2. Situation: A temporary or permanent short may exist within Battery
Pack electronics. As this behavior has been known to self-correct in
numerous instances, moisture from melting snow or otherwise may
cause temporary short. A permanent short may result from loose
male contact in Battery Pack Plug Hole.
3. Solution: DO NOT USE BATTERY PACK UNTIL SYMPTOMS
CEASE. If unchanged, Battery Pack must be replaced.
BATTERY PACK:
BATTERY PACK LED WILL NOT TURN ON, BUT WHEN
RECHARGING, LED TURNS ON AND CANNOT BE TURNED OFF
1. Symptom: Battery Pack will not turn On, but when Recharging,
Battery Pack LED turns On and cannot be turned Off.
2. Situation: Battery Pack ON Button is not functioning properly and is
likely LOCKED in On position. Cause may be from impact or other
malfunction. When charge level in Battery Pack becomes low
enough, LED turns Off. When charge level becomes high enough,
LED turns On automatically and cannot be turned Off.
3. Solution: Battery Pack must be replaced.
BATTERY PACK:
LED CANNOT BE TURNED OFF
1. Symptom: Battery Pack LED cannot be turned Off.
2. Situation: Battery Pack ON Button is not functioning properly and is
likely LOCKED in On position. Cause may be from impact or other
malfunction. When charge level in Battery Pack becomes low
enough, LED turns Off. When charge level becomes high enough,
LED turns On automatically and cannot be turned Off.
3. Solution: Battery Pack must be replaced.
Troubleshooting continued…
FOOTWARMER “m” SERIES:
SYSTEMS EXPLAINED & TROUBLESHOOTING
THE STRENGTHS OF HOTRONICS FOOTWARMER POWER PLUS!
Winter Season 08-09
Page 4
KEEPING FEET WARM!
Hotronic USA, Inc.
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